The latest RELEASE

assimp 4.1.0: released December 2017
Go to Download Page ( source only ) 

Snapshot of the latest source:

 

Older releases:

assimp 4.0.1: released July 2017
Go to Download Page ( source only ) 

assimp 3.3.1: released July 2016
Go to Download Page ( source / installer for windows ) 

assimp 3.3: released July 2016
Go to Download Page ( source only ) 

assimp 3.2: released November 2015
Go to Download Page ( source only ) 

assimp 3.1.1: released June 2014
Go to Download Page 

assimp 3.0: released July 2012 (changes from 2.0)
Go to Download Page 

assimp 2.0: released November 2010 (changes from 1.1)
Any platform: ZIP archive, full source code / Windows: Viewer & tools only 

assimp 1.1: released April 2010 (changes from 1.0)
Any platform: ZIP archive, full source code / Windows: SDK Installer / Windows: Viewer & tools only 

assimp 1.0: released May 2009 
Any platform: ZIP archive, full source code Windows: Command line tools only

assimp 0.1: released October 2008
This release is no longer supported.

 

DISTROS

Rosen Diankov of OpenRAVE maintains a set of Ubuntu packages for assimp, which can be found here. Packages for Ubuntu, ArchLinux and Fedora/RedHat are also available. Many Linux distributions have Assimp in their default repositories.