Steak is a german <-> english translator under GPL.
A command line tool allows the translation of words in
both directions. Additionally steak can call ispell 
to correct mistyped words. 

If build with make -D xsteak ... a small xwindows 
programm allows the translation of words interactively

WWW: http://www.tm.informatik.uni-frankfurt.de/%7Erazi/steak/steak.html