From ProZ.com Wiki

Overview

Features

Tool list

• OmegaT, free/open source CAT software, written in Java, fully cross-platform, and treating a broad variety of file formats, including all MSOffice® file formats, Trados® ttx files, various software localization files, html, and more, using standard .tmx translation memories, including glossary tools, and other valuable tools.
• Anaphraseus, functions as a macro in OpenOffice (free/open source office suite), produce unclean doc/rtf files, and uses Wordfast® like plain text memories, but can import/export standard .tmx translation memories.

Links

• Wikipedia article on "Computer-assisted translation"
• Wikipedia article on "Translation Memory"
• Wikipedia article on "Translation Memory (hidden links to TM Software )"