Cacher is the code snippet organizer for pro developers

Release 1 (1996)
Release 2 (1997)
Release 3 (1999)
Release 4 (2001)
Release 5 (2003)
Tridion 5.1 (2005)
Tridion 5.2 (2006)
SDL Tridion 5.3 (january 2008)
SDL Tridion 2009 (november 2009)
SDL Tridion 2011 (januari 2011)
SDL Tridion 2011 SP1
SDL Tridion 2013 (april 2013)
SDL Tridion 2013 SP1 (november 2013)

SDL Web 8 (to be released H2 2015)

Also see https://community.sdl.com/solutions/content-management/tridion/tridion-developer/b/weblog/posts/sdl-web-8-what-s-in-a-name-part-1

Source for older verions: http://www.gidscms.nl/compare/sdl_tridion/hippo