The best place to fetch AGISim sources is from anonymous@agisim.cvs.sourceforge.net:/cvsroot/agisim.
Build instructions may be found at the project website.
Linux and Windows installer packages plus source and binary tarballs for AGISim 1.0.0-beta are forthcoming.
We're preparing for the release of AGISim 1.0 beta; volunteers are welcome to join the AGISim project!