some good programs are advanced task manager free which lets you choose what apps are running in backround, there are a few good games... such as trap and asteroids. however i cant really provide info on paid apps because all i have is free ones. handcent SMS is probobly the best app ive downloaded because it lets you fully customize your messaging app. You can also download different fonts for it and such... dolphin browser is the second best because it gives you tabbed browsing like firefox and also multitouch, gestures, and other features that are great and not standard on any of the current android platforms. hope this helped.
