My list looks boring next to everyone else's but here goes:

1) Google Maps
2) InfoSpace FindIt!
3) Free Range
4) BB weather
5) Opera Mini 4 Beta
6) Soft Reset
7) ColorPearl
8) AutoLock

I don't understand how people can have so much stuff on their phones and still have enough memory to function properly (ie not randomly deleting messages when memory gets low). I have those apps and have done all the tricks in the book to free up as much memory as possible and still only have 21 MB of free memory.