Few days ago I started new project at google sorce. It allows create dictionary with translations, synonyms and other word relations. Homepage of project is http://gemini-dictionary.googlecode.com. It it set of plugins (2) for netbeans RCP 6.0. If you have some suggestions or want to participate please feel free to contact me.

It is still in beta (maybe alpha :) ) quality state so be patient to first release.

Sources are available in mercurial repository http://www.hlavki.eu/hg/gemini-dictionary.