I'd add:
- Picturen Lite - the best and smoothest gallery browser I've ever had in my Buzzy. Especially loading and zooming in fullscreen mode works superbly
- Zeam Launcher - if speed and simplicity are the most important for you - you won't find anything better.
- Adobe Photoshop Express - brilliant simple in use, quite fast, eye-candy, does what it's expected for.
- Smooth Calendar - an excellent small agenda widget.
- SwitchPro Widget - brilliant way to switch on/off primary things straight from your main screen. Though you have such a bar in notifications area, this is much quicker and nicer way. It's not free, but I don't regret a penny.