The most recent Windows version of WordNet is 2.1, released in March 2005. Version 3.0 for Unix/Linux/Solaris/etc. was released in December, 2006. WordNet binaries and source are available for Windows and Unix-like systems (Irix, Solaris, and Linux binaries). There is also a Prolog package and some additional standoff files. WordNet 2.1 for Windows WordNet browser, command-line tool, and database