In your opinion, what are the best android apps compatible with a MyTouch 3G slide?

[MyTouch3Gslideowner]

Please list at least 5! Also, if you know how to update a MyTouch 3G slide or Jailbreak a 2nd generation iPod touch, search for "How do I update my MyTouch 3G slide to the newest android firmware version?" and "How do I jailbreak my iPod touch 2nd generation?". Thank You!