Apertium is a machine translation platform, initially aimed at related-language pairs, but recently expanded to deal with more divergent language pairs (such as English-Catalan). The platform provides a language-independent machine translation engine, tools to manage the linguistic data necessary to build a machine translation system for a given language pair, and linguistic data for 21 language pairs, with more under development.
The platform also includes cell phone applications, blog plugins, web services and several graphical user interfaces. Apertium may translate plain text, web sites or documents without loss of formatting.
The Okapi Framework is a set of interface specifications, format definitions, components and applications that provides an environment to build interoperable tools for the different steps of the translation and localization process.