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