Free/open-source machine translation software

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 defined by the Free Software Foundation,
• or an open-source license as defined by the Open Source Initiative.

Rule-based systems

• Apertium, a free/open-source rule-based machine translation platform.
• Matxin, a free/open-source rule-based machine translation system for Basque.
• OpenLogos, a free/open-source version of the historical Logos machine translation system.
• Anusaaraka, English-Hindi machine translation system.

Statistical machine translation systems

Decoders

• Moses, a statistical machine translation system.
• Marie, an n-gram-based statistical machine translation decoder.
• Joshua, an open source decoder for statistical translation models based on synchronous context free grammars
• Phramer, an open-source statistical phrase-based machine translation decoder
• GREAT, a decoder based on stochastic finite-state transducers, which includes a training toolkit.

Training translation models

• Giza++ is a tool to train translation models for statistical machine translation (see also the related mkcls tool to train word classes)
• Thot is a toolkit to train phrase-based models for statistical machine translation. Read more. Source: DCU School of Computing