OpenSimulator - User contributions [en]

Development Team

2007-12-08T15:25:49Z

Opensource Obscure: /* Additional Developers/Testers/Contributors */

== OpenSim Core Developers ==

(please add in as much info as you like for your name)

<table border="1" cellpadding="2" cellspacing="0">
<tr>
<th>IRC Nick </th>
<th>Name</th>
<th>SL Avatar</th>
<th>Time Zone<br>(UTC)</th>
<th>Org</th>
<th>Areas of Interest</th>
</tr>
<tr>
<td>[[User:MW|MW]]</td>
<td>Michael Wright</td>
<td>Wright Juran</td>
<td>+0</td>
<td> </td>
<td>everything</td>
</tr>
<tr>
<td>[[User:Adam Frisby|Adam Frisby]]</td>
<td>Adam Frisby</td>
<td>Adam Zaius</td>
<td>+8</td>
<td>DeepThink Pty Ltd</td>
<td>Terrain, Performance</td>
</tr>
<tr>
<td>[[User:MingChen|MingChen]]</td>
<td> </td>
<td> </td>
<td>-6</td>
<td>DeepThink Pty Ltd</td>
<td> </td>
</tr>
<tr>
<td>[[User:lbsa71|lbsa71]]</td>
<td>Stefan Andersson</td>
<td>PierreJoseph Proudhon</td>
<td>+1</td>
<td>Tribal Media AB</td>
<td> 3D and Web Integration</td>
</tr>
<tr>
<td>[[User:SeanDague|sdague]]</td>
<td>Sean Dague</td>
<td>Neas Bade</td>
<td>-5</td>
<td>IBM</td>
<td>Database, Linux</td>
</tr>
<tr>
<td>[[User:babblefrog|babblefrog]]</td>
<td>Brian McBee</td>
<td>Dogen Coldstream</td>
<td>-8</td>
<td>Disorganized</td>
<td> </td>
</tr>
<tr>
<td>[[User:Tedd|Tedd]]</td>
<td>Tedd Hansen</td>
<td>Tedd Maa</td>
<td>+1</td>
<td>Tedd Hansen</td>
<td>Programming/Scripting/Architecture</td>
</tr>
<tr>
<td>[[User:danx0r|danx0r]]</td>
<td>Dan Miller</td>
<td>Albert Pascal</td>
<td>-8</td>
<td>squiggle.com</td>
<td>PHEEZIKS; everything</td>
</tr>
<tr>
<td>[[User:dalien|dalien]]</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td>ZeroPoint</td>
<td> </td>
<td>Guilderoy Dench</td>
<td>-5</td>
<td> </td>
<td>Programming/Database</td>
</tr>
<tr>
<td>Tleiades</td>
<td> </td>
<td>Tleiades Hax</td>
<td>+1</td>
<td> </td>
<td>Grid servers/Database</td>
</tr>
<tr>
<td>cfk</td>
<td>Charles Krinke</td>
<td>Charlesk Bing</td>
<td>-8</td>
<td> </td>
<td>Reliability/Grid servers/ll-functions</td>
</tr>
<tr>
<td>[[User:chi11ken|chi11ken]]</td>
<td>Jeff Ames</td>
<td>Chillken Proto</td>
<td>+9</td>
<td>3Di</td>
<td> </td>
</tr>
<tr>
<td>[[User:Darok|Darok]]</td>
<td> </td>
<td>Darok Kaminski</td>
<td>+1</td>
<td> </td>
<td>Physics engines (especially BulletX)</td>
</tr>
<tr>
<td>[[User:adjohn|adjohn]]</td>
<td>Adam Johnson</td>
<td>Zeuz Zenovka</td>
<td>+9</td>
<td>3Di</td>
<td> </td>
</tr>
<tr>
<td>[[User:Teravus|Teravus]]</td>
<td>Teravus</td>
<td>Teravus Ousley</td>
<td>-5</td>
<td>W3z</td>
<td>Physics & Admin tools, A working sim.</td>
</tr>
</table>

== Additional Developers/Testers/Contributors ==

<table border="1" cellpadding="2" cellspacing="0">
<tr>
<th>IRC Nick </th>
<th>Name</th>
<th>SL Avatar</th>
<th>Time Zone<br>(UTC)</th>
<th>Org</th>
<th>Areas of Interest</th>
</tr>

<tr>
<td>[[User:jtclark48|jclark4]]</td>
<td>Jay Clark</td>
<td>Jay Clarke (Second Life)</td>
<td>-5</td>
<td>IBM</td>
<td>Physics, Grid Host, AI, Scripting, Testing</td>
</tr>
<tr>
<td>Gareth</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td>[[User:AdamStevenson|BigFootAg]]</td>
<td>Adam Stevenson</td>
<td>Adamus Petrov</td>
<td>-6</td>
<td>Texas A&M University</td>
<td>AI, Skynet, Evolving Systems, Biology</td>
</tr>
<tr>
<td>[[User:Vicero Lambert|Vicero Lambert]]</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td>Ldvoipeng</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td>idoru</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td>[[User:Magi|Magi]]</td>
<td>Andy Agnew</td>
<td>Magi Merlin</td>
<td>+10</td>
<td>Spun Pty Ltd</td>
<td>3D Web Integration, Database stuff and playing with the odds and ends box.</td>
</tr>
<tr>
<td>john_</td>
<td>John Moyer</td>
<td>VAJohn GeekSquad or Matthew Kendal</td>
<td>-5</td>
<td>Best Buy/Geek Squad</td>
<td> </td>
</tr>
<tr>
<td>[[User:ClarkZone|ClarkZone]]</td>
<td>Troy Admin(@ClarkZone)</td>
<td>Troy Childs(Secondlife)\Troy Admin (ClarkZone)</td>
<td>-5</td>
<td>Http://clarkzone.dyndns.org</td>
<td>Tester and Grid Host</td>
</tr>
<tr>
<td>[[User:aiaustin|aiaustin]]</td>
<td>Ai Austin</td>
<td>Ai Austin (Second Life)<br>Ai Beta (DeepGrid)</td>
<td>+0</td>
<td>AIAI, University of Edinburgh<br>http://www.aiai.ed.ac.uk/~ai/</td>
<td>Windows Vista tests</td>
</tr>
<tr>
<td>[[User:balthazar|balthazar]]</td>
<td>Trevor Brooks</td>
<td>Balthazar Sin</td>
<td>-5</td>
<td>None</td>
<td>Terrains, testing and some small coding tasks</td>
</tr>
<tr>
<td>[[User:jimbo2120|jimbo2120]]</td>
<td>Michael Osias</td>
<td>Illuminous Beltran</td>
<td>-5</td>
<td>IBM</td>
<td>Grid, AI, Skynet, coding and testing</td>
</tr>
<tr>
<td>[[User:Sakai|Sakai]]</td>
<td>Steve S</td>
<td>Sakai Openlife (OpenlifeGrid)</td>
<td>+10</td>
<td>http://www.openlifegrid.com</td>
<td>Grid, Hardware, Testing, Contribution</td>
</tr>
<tr>
<td>[[User:TayB|TayB]]</td>
<td>Earl B</td>
<td>Taylor Boyau (Second Life)</td>
<td>-10</td>
<td>Vizi</td>
<td>Grid Host,Networking,Contributions & Testing.</td>
</tr>
<tr>
<td>[[User:JamieDav|JamieDav]]</td>
<td>Jamie David</td>
<td>Jamie David (Second Life)</td>
<td>+7</td>
<td>Forum</td>
<td>Grid, Sim, Avitar, Functionality</td>
</tr>
<tr>
<td>[[User:Justincc|Justincc]]</td>
<td>Justin Clark-Casey</td>
<td>Justin Clark-Casey (osgrid) / Lulworth Beaumont (Second Life)</td>
<td>+0</td>
<td>IBM</td>
<td>Inventory (avatar and object), grid, everything else except physics.</td>
</tr>
<tr>
<td>[[User:Krtaylor|Krtaylor]]</td>
<td>Kurt Taylor</td>
<td>Kurt Stringer </td>
<td>-6</td>
<td>IBM</td>
<td>Grid, Networking, Monitoring, Scripting, Inventory, Testing</td>
</tr>
<tr>
<td>[[User:Nink|Nink]]</td>
<td>Peter Finn</td>
<td>Nink Noonan(Second Life)</td>
<td>-5</td>
<td>IBM</td>
<td>Disruptive Influence.</td>
</tr>
<tr>
<td>[[User:Bruce|Bruce]]</td>
<td>Bruce Meerson</td>
<td>Bruce Meerson(Second Life)</td>
<td>+8</td>
<td>HiPiHi</td>
<td>Watching.</td>
</tr>
<tr>
<td> </td>
<td>Dan</td>
<td>Charlie Omega(Second Life)</td>
<td> </td>
<td> </td>
<td>Mild coding/tweaking/simple feature adds, Stress testing/break stuff, Testing limits of existing code.</td>
</tr>
<tr>
<td>oobscure</td>
<td> </td>
<td>Opensource Obscure</td>
<td>+1</td>
<td>http://www.opensim.it</td>
<td>Running a public Linux sim for testing, Docs, Helping italian users, Building opensim communities, Watching</td>
</tr>
</table>

FAQ

2007-11-27T00:50:59Z

Opensource Obscure: /* Terrain Tidbits */ Added: 'How do I import into OpenSim the terrain shape of my Second Life sim?'

A list of frequently asked questions. Please add anything you think is reasonable here.

= What is OpenSim? =

OpenSim is a platform for operating a virtual world, and supports multiple independent regions connecting to a single centralized grid. This is somewhat similar to the web, where anyone can run their own web server, tied together through the internet. It can also be used to create a private grid, analogous to a private intranet.

=== What is a region? ===

A region is what you see when you log into OpenSim. It is the physical place (well, virtually physical) where avatars move and interact. It is a square patch of land which may contain an island, mountains, a plain, buildings, etc., or just an ocean.

=== What is the grid? ===

The grid is the level that organizes the regions and their positions in the world, and handles things that need to exist across regions, such as a user's inventory. You can think of it as similar to the world map.

=== What does ... mean? ===

See [[OpenSim:TechRef]] for definitions of some terms commonly used in OpenSim.

= Building OpenSim =

=== I can't find any build files or solution files ===

* If you're on Windows, run <tt>runprebuild.bat</tt> - on Linux/Mac <tt>runprebuild.sh</tt>

=== VS2005 won't open the .sln file ===

* Try running VS2005 C#. You are probably running VS2005 C++. This is a C# project.

= Running OpenSim =

=== Running OpenSim.exe from a Cygwin shell has access denied for some dll's ===

* Do a '<tt>cd bin</tt>' followed by '<tt>chmod a+x *</tt>' to make all dll files executable.

=== I cannot start my sim ===

* See [[OpenSim: Running]].

= Configuring OpenSim =

First, read [[OpenSim: Configuration]].

=== Where can I get a new UUID for my sim config? ===

Use '<tt>uuidgen</tt>' or generate one on the [http://www.famkruithof.net/uuid/uuidgen uuidgen webpage].

=== Can I run multiple regions with OpenSim? ===

Yes. To do this add another xml file to <tt>bin/Regions</tt>. You need to create a new 'sim_UUID' (see above) and change the 'sim_name', 'internal_ip_port', 'sim_location_x' and 'sim_location_y' (and anything else you wish to change). The script <tt>share/regions/make.php</tt> may be useful for generating region files automatically. Once the new region files have been added to <tt>bin/Regions</tt>, restart OpenSim.

Note that <tt>sim_location_x</tt> and <tt>sim_location_y</tt> should be in adjacent regions, so you will be able to run back and forth between regions.

* See [[OpenSim: Configuration]].

=== How do I enable prim storage? ===

* In the <tt>OpenSim.ini</tt> file, change the <tt>storage_plugin</tt> so it points to <tt>OpenSim.DataStore.MonoSqlite.dll</tt> (<tt>storage_plugin = OpenSim.DataStore.MonoSqlite.dll</tt>).

Note: you can specify the same database for all <tt>region.xml</tt> files, as information in the database is stored with the region.

Currently, sqlite is the only database provider that works for prim storage, this will change in the future.

=== There are a bunch of textures in the library, but they are all 0x0? What's wrong? ===
To enable these extra textures for your use, you must delete your <tt>regionassets.yap</tt> file, and restart your sim. WARNING: IF YOU DO THIS, YOU WILL LOSE ANY ASSETS (textures, scripts, animations, etc) THAT YOU HAVE UPLOADED!

=== What databases are supported in OpenSim? ===
Right now the only database supported is sqlite. This is being done first to ensure all our persistent data is SQL friendly for storage, and because sqlite requires no user interaction to setup. The architexture for OpenSim specifically allows for different data store backends, and others will be created in the near future.

=== Can I export all my prims, for safe keeping? ===

Yes. From the console type
save_xml yourbackupfile

You can later load those prims with
load_xml yourbackupfile

This is also a good way to dump and clone prims from one OpenSim server to another.

= Something Has Gone Wrong! =

=== I get a timeout during region handshake ===

* Do you have the correct IP in your Regions\* config files?
* Do you have multiple interfaces on the server running OpenSim? OpenSim will not bind outgoing UDP packets to a specific IP, its default IP to reach you will be what the Region answers UDP with. If you have configured the region for another IP you will get a timeout during connect.

=== I cannot connect to my OpenSim ===

* See [[OpenSim: Connecting]].

=== I can connect but cannot move ===

If the client connects but the avatar can only spin in place and not move, then the sim is not correctly configured. It completed the initial login function, but packets are not being exchanged between the client and the sim, probably due to a network configuration error on the sim.

* See [[OpenSim: Configuration]].

=== From time to time my Avatar seems to get stuck ===
Right now there is a bottle neck when syncing prims off to the database. This will cause small (5 - 10 second) apparent hangs of the Avatar, but it will recover fine once the data is synced. It is a known issue based on legacy architecture of some of the data storage code. We hope this will be removed soon.

=== I have problems with viewing the worldmap ===

* This may happen when running OpenSim on a Linux server, both in grid or standalone mode.
* Symptoms: when opening the worldmap window in the SL-viewer, the sims are not displayed grahically in the worldmap, the server console shows some error related to openjpeg, the current session freezes...
* Reason: your svn source trunk does not have the correct (or whatever...) <tt>libopenjpeg-libsl</tt> library.
* Solution: get the newest code from libsecondlife (<tt>svn co svn://opensecondlife.org/libsl/trunk</tt>), '<tt>make</tt>' manually in the subdir <tt>openjpeg-libsl</tt>, and copy the resulting <tt>libopenjpeg-libsl-2.1.2.0.so</tt> into your OpenSim <tt>bin</tt> subdir, overwriting the existing one.
* Recompile & restart OpenSim.

= Exceptions on the Console =
This is a list of Exceptions that you may see on the console, what they mean, and if they are a problem.

=== System.DllNotFoundException: ./libopenjpeg-libsl-2.1.2.0.so ===
Failed generating terrain map: System.DllNotFoundException: ./libopenjpeg-libsl-2.1.2.0.so
at (wrapper managed-to-native) OpenJPEGNet.OpenJPEG:LibslAllocDecoded OpenJPEGNet.OpenJPEG/LibslImage&)
at OpenJPEGNet.OpenJPEG.Encode (System.Byte[] decoded, Int32 width, Int32 height, Int32 components, Boolean lossless) [0x00000]
at OpenJPEGNet.OpenJPEG.EncodeFromImage (System.Drawing.Bitmap bitmap, Boolean lossless) [0x00000]
at OpenSim.Region.Terrain.TerrainEngine.ExportJpegImage (System.String gradientmap) [0x00000]

You are on Linux, and the native lib libopenjpeg-libsl-2.1.2.0.so is not compatible with your system for one of the following reasons:
* You have an old processor (libopenjpeg has been compiled with optimizations)
* You are running in 64bit mode (none of the native libs are built for 64bit)

You can rebuild your own libopenjpeg from source, or run in a compatible environment.

= OpenSim in the Wild =

=== Are there test servers running OpenSim I can connect to? ===

Yes. Check out http://www.deepgrid.com, http://osgrid.org

There are also often many private servers up for testing. Hang out on the IRC channel (efnet #opensim), and troll for URI's.

=== Can I teleport from the Linden Lab Second Life grid to my Sim? ===

No, OpenSim islands cannot connect to the Linden Lab grid.

= Terrain Tidbits =
=== What programs can I use to create terrains for OpenSim? ===
If you are after simple terrain files (jpg, gif, etc), you can use Photoshop or any number of freeware programs, like [http://www.gimp.org/ Gimp]. If you want more complex terrains, you will need programs that output to standard 3d raw format (aka r32 or r64). [http://www.bundysoft.com/L3DT/ L3DT] and [http://www.planetside.co.uk/terragen/ Terragen] are two of the top commercial programs for this. (anyone know of a freeware one?), or you could, with some practice, use [http://www.blender.org/ Blender]. The free version of L3DT can make terrains up to 2048x2048 in size, or 8x8 regions.

=== Where do I put the files for my terrains? ===
This one is actually pretty simple, but first the 'hard' answer: anywhere in the PATH will work. Lost? yeah, I was too, so... just drop the file into the <tt>bin</tt> directory (right where your <tt>OpenSim.exe</tt> file is).

=== How do I change the terrain for a group of sims? ===
First, the file must be in f32 (or f64?) format. This is easy to do with L3DT's export feature. (Use the RAW format and set the options to <tt>Y flipped = true</tt> and at the bottom, change it to read 'float' instead of 'ushort'). It also needs to be a file that will cover each sim in a 256x256 layer (so, for 2x2 regions, you need a 512x512 file).

Then, once you have it saved, on the <tt>OpenSim.exe</tt> console, type in:

terrain load-tile f32 <filename> <image X> <image y> <bottomleftsim X> <bottomleftsim y>

For example, I run a square of 4 sims in a 2x2 pattern. I started my sim placement at 0, 0 and ended at 1, 1. my line reads:

terrain load-tile f32 simalpha.raw 512 512 0 0

Next, before you log in, you may want to go to type in:

terrain multiply 0.4

This should scale it down from the nearly 300 meters altitude I ran into to something a little more reasonable for the minimap.

=== How do I load a terrain file on startup? ===
Edit the file <tt>startup_commands.txt</tt> in the bin directory and add the above commands "<tt>terrain load-tile ...</tt>" and "<tt>terrain multiply ...</tt>" one per line.

Terrain Tidbits brought to you by Tilde, with a few questions in IRC :) - [[User:Tildeampersand|Tilde]] 10:32, 15 August 2007 (PDT)

=== How do I import into OpenSim the terrain shape of my Second Life sim? ===

Use the command

terrain load

Watch [http://archimedix.wordpress.com/2007/11/26/opensim/ this video] for a step-by-step tutorial.

= In World Questions =

=== Does in world scripting work yet? ===

Not yet, but there is a lot of work going on here. Please see [[LlFunction_implementation_status]] for the latest info.
Test

=== Why do I walk through objects? ===

Basicphysics doesn't support collisions between objects (just between you and the ground). There is active work on other physics engines for OpenSim, but these are quite experimental at this point, so not considered supported.

=== Can I customize my avatar? ===

Yes. In order to do this:
* Click the Inventory Button
* Create -> New Clothes -> Shirt, Pants, etc
* Create -> New Body Parts -> Hair, Shape, etc
* Edit those from your inventory
* Wear them

Your avatar doesn't always face a nice direction for doing this, so you'll need to use the camera operations to see your face for some of the modifications. This is a known issue, will be fixed in the future.

Also, you'll need to rewear you parts once you first join the environment. Right now default appearance is always "Ruth".

= Grid Mode =
Note: Grid Mode isn't officially supported yet. As such, you are pretty much on your own if you are trying to get OpenSim up and running in Grid Mode.

=== I start the sim and it doesn't connect to any grid ===

When OpenSim is first started, it needs configuration.

* See [[OpenSim: Configuration]].

=== I start the OpenSim.Grid.UserServer.exe and it gives an error ===

If this error is access denied for <tt>username@localhost</tt>, the mysql database is not set up.

It will print some text and wait for input - either an enter to accept a default value, or another value you can supply.

* See [[OpenSim: Configuration]].

=== I want to run my own Local Grid but one or more servers fail to start ===

* Be sure that you're able to start <tt>OpenSim.exe</tt> alone, in Standalone mode, and to be able to login.
* Start the servers in the correct UGAS order and answer the questions as recommended (see [[OpenSim: Configuration]]).
* Set all the external URI's to the correct IP: 127.0.0.1 if running on your local machine, or aaa.bbb.ccc.ddd if running on a remote server.
* Check again all the <tt>*.xml</tt> configuration files for any wrong settings or typing errors...!
* Don't forget to connect with your SL-viewer to port 8002 (Grid User-Server) instead of 9000 (Standalone OpenSim-Server).
* Delete all <tt>*.xml</tt> and <tt>*.yap</tt> files in the <tt>bin</tt> directory if you want to run a full reconfiguration again.

=== After the shiny new grid is running, what is next? ===
* Make sure one can stop/restart UGA &S (sims). Check out any ordering issues of stop/restart UGA w/o stop/restart sim(s).
* Make sure one can add/delete both a region and a user from the database.
* Make sure it runs overnight and check it each morning by logging into 1 or 2 key sims.
* '<tt>tail -f userserver.log</tt>' and watch/understand the login process.
* Make sure when you logoff your system, you can log back on and get control of the UGAS consoles.

= How to ask for help =

=== Before asking for help... ===

* Search the wiki and web before asking for help.
* Check your configuration files for any obvious defects.
* Check that you're starting up the processes correctly.
* See [[OpenSim: Install]].
* See [[OpenSim: Configuration]].
* See [[OpenSim: Running]].
* See [[OpenSim: Connecting]].

=== Asking in IRC ===

IRC channels are <tt>#opensim</tt> and <tt>#opensim-dev</tt> on EFNet. Approach them in that order :) Please be courteous and remember that the developers and anyone else assisting you are volunteers there.

* Don't ask to ask, just ask.
* Phrase your question in the form of a question.
* Be specific.
* Explain the problem.
* Describe how to reproduce the problem.
* If you need to paste configuration files or error messages, please paste to [http://pastebin.ca/ pastebin] then send the link in the IRC channel.

=== After you get help ===

* If no-one can help you, please submit a bug.
* If someone does help you, please document the problem and fix on the wiki on this page.

Office hours

2007-11-16T23:13:48Z

Opensource Obscure: added Italy

OpenSim weekly office hours are held in an OpenSim world somewhere on the Internet. The purpose of these office hours is to created a focussed weekly discussion on the state of OpenSim, and things that need attention. It is intended for people wishing to become contributors to the project, so if you show up, you'll probably walk away with something on your todo list.

The office hours are held on Tuesdays at 19:00 UTC. This corresponds to:
* 11:00 - San Francisco (U.S.A. - California)
* 14:00 - New York (U.S.A. - New York)
* 19:00 - Oslo (Norway)
* 20:00 - Italy
* 02:00 Wed - Perth (Australia) (sorry adam)

The office hours will take place at the sim "Wright Plaza" on osgrid, which was called "Sang" until last Friday.

To get to this sim, make sure you have created an account with the normal first, last and password and set the home location to "Wright Plaza". This is done at http://www.osgrid.org.

Then startup the client with a -loginuri of "-loginuri http://osgrid.org:8002" and you should arrive on "Wright Plaza".

=== Previous Agenda Items ===

Cfk would like to suggest that we give some thought to the following bugs.
#) Remoting exceptions with adjacent non-running sims.
#) Prim unlinking.
#) Enabling the script editor from the edit prim dialog box.
#) jpeg/ode dll and glibc-2.4 exceptions and stability.
#) GridServer.exe locks up in r2090 and works fine in r2060 on OSGrid.
#) Enabling avatar 'sit' on a prim.
#) More progress on avatar customization consistency. (Avatar changes when crossing region boundaries).

== Logs ==

* [[Chat log from the meeting on 2007-10-09]]
* [[Chat log from the meeting on 2007-10-16]]
* [[Chat log from the meeting on 2007-10-23]]
* [[Chat log from the meeting on 2007-10-30]]
* [[Chat log from the meeting on 2007-11-06]]
* [[Chat log from the meeting on 2007-11-13]]

User:Opensource Obscure

2007-11-16T23:11:01Z

Opensource Obscure: New page: [http://onxiam.com/people/Opensource%20Obscure/ More info]

[http://onxiam.com/people/Opensource%20Obscure/ More info]