A great site you just have to visit

http://www.vocaboly.com

I wish I had known about this vocbulary program site back when I was teaching English as a Second Language. They have all kinds of great products that aren't just for English language learners, but for anybody interested in improving their vocabulary. They have some cool quizzes you can take, too. One drawback may be that it only works on PCs, not Macs. What's great about this site and the programs they offer, is they have audio pronunciation. It's much easier to learn a language with audio in conjunction with written words, but without proper pronunciation, you're stuck using those weird dictionary symbols, instead of hearing the words spoken by a real person. Vocaboly has this. And you can try before you buy, so it's all good. It also looks like they have German, too.