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Source code

Here are the current released versions of OpenSim.

Please see Branches for more information on the repository branches and what they are for.

Please note: As OpenSim is still at an alpha code maturity stage, there is absolutely no guarantee that functionality works or is stable, even in the numbered releases. Certain features may not work either because the code is in rapid evolution, or because functionality expected by the Linden Labs Second Life viewer has simply not been implemented yet. However, constructive feedback is still welcomed.

Also, please be aware that OpenSim requires that you have a fair amount of technical knowledge in order to set it up.

The lastest source releases are always hosted at, the current latest releases is 0.6.4 and provided as:

The only difference between the 2 is the archive format, the source is exactly the same.

Release Code via Subversion

Instead of using a source archive release, you can pull specific releases from our subversion. For Windows you can install just Subversion or the often preferred Tortoise Subversion extension. Mac OS X 10.l5 and above have Subversion built but OS. X 10.4.x can still download Subversion. All Linux systems should have subversion installed, or available from their package repositories.

  • 0.6.4 Alpha with post-release fixes (preferred)
svn co opensim
  • 0.6.4 Alpha release tag
svn co opensim


The OpenSim project only does source based releases, which you must Build_Instructions compile yourself. Many members of our community provide binary installers that you can used based on those source releases. Links below are provided for convenience.


  • 0.6.3 Windows Installer (Postfix Edition r8730)
  • 0.6.2 Windows Installer

Older Versions Archive

All older versions of OpenSim are available from the svn repo. Please be aware that even if there is zero official support for the latest version, there's even less support for older ones. They are kept here for historical and technological reference only.

The 'official' release tags are kept here:

The post-fixes, as well as some experimental offshoots are kept here:

Experimental Upstream Code

There Be Dragons Beyond This Point

If you are truly feeling dangerous, adventurous, or want to help us test the next version of OpenSim you are welcome to grab the latest unstable code out of our subversion trunk. Any warnings previous expressed about the alpha nature of the code go double or triple if you are running directly off of trunk. Never, ever, ever, never run this in production environments, it is not suitable for that unless you are very familiar with the source code, and can hot fix any piece of it (that probably means you are an OpenSim core member). Feedback and testing on the unstable tree is appreciated, as that helps us make the next release better. If this scares you from using trunk, that was intended.

If it breaks, you get to keep both pieces.

  • Latest Subversion revision version (bleeding edge)
svn co opensim

Another option for obtaining the code is via git from the OpenSim Git Mirror. The git mirror only contains trunk code (no branches or tags) and may be up to 1 hour behind the svn trunk.

  • Latest git revision version (bleeding edge)
git clone

Related Software

Related Software Section - CLICK HERE

Pages by Category: User-pages, Developer-pages, Scripts

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