The Shawshank Redemption, (Also, I love the fact that the movie was first a short story by my favorite author, Stephen King!) Seven was great. I also really like the new Batman movies, but those aren't really Morgan Freeman driven vehicles. Um, Bruce Almighty was funny. Lucky Number Slevin had a good role for him.
People also forget that he was in The Unforgiven, possibly the best western ever.
Oh, and Robin Hood: Prince of Thieves. Wow, this man has seriously best in some of my favorite movies ever.