for all Hebrew learners who are serious about getting their conjugations right ;), here is an excellent app to learn/check Hebrew verbs:
present, past, future tenses, imperative and gerunds. with niqqud.
i started using it a few months ago when i started a course at the ulpan, and i cannot live without it now!
Thanks for the tip!
Now we need an app like this for the Android that really works! I finally bought the book 501 Hebrew Verbs.