This is an answer to the memory boosting / recovery apps that cost a lot of money. Simple, no-nonsense and to the point, and I think this gets the job done at least as well and probably better:
http://store.berryreview.com/product.asp?id=40897
I've written long posts in the past against memory recovery apps, but now think there actually is some benefit in having a way to trigger garbage collection manually at chosen times -- such as just before starting an action game. The system is smart but not smart enough to know it should do garbage collection just before starting a game to avoid creating a pause during play when it could have gotten that out of the way beforehand.
Also, there are times during phone use that seem like opportune moments to take one to several seconds to collect garbage, such as whenever the backlight turns off, or when you unplug after charging. Better to get the garbage collection out of the way then so once we resume activity we have as long as possible before the next pause for garbage collection.