In this article, Mike L. Forcada provides a very long list of free and open-source machine translation software. In addition to rule-based and statistical MT engines, he also provides example-based MT, multi-engine MT, and many additional resources. This is a post to bookmark and return to later.

Here’s a non-exhaustive list of links to existing free/open-source machine translation systems, which I will try to complete as I find about them. To the best of my knowledge, software listed here has: either a free license as …
Via termcoord.wordpress.com

Val Swisher