Active Vocab
   [Win] Program for archiving and learning of vocabulary
   http://www.vocab-trainer.com/

Learn German, French and Italian
   [Win] Computer based vocabulary building program. Puzzles and readers are also provided.
   http://www.pennantsw.com.au/

Superior Vocabulary
   [Win-Mac] Vocabulary-building software tutorial.
   http://www.superiorvocabulary.com/

VTrain
   Windows vocabulary preparation software, It quizzes by way of flashcards. Download free vocabulary files in forty languages.
   http://www.paul-raedle.de/vtrain/home.htm

Vocabulary Trainer: learn Spanish, French, German
   [Win-Mac] Foreign language vocabulary learning software, with individual word list and quizzes.
   http://learnandteach.com/

Word Trees
   Use exercises based on the underlying Latin and Greek roots of English words to help students increase their English vocabulary.
   http://www.wordempire.com