NTFS-3G cpu usage

As others already let clear, Apple doesn't offer any good solution for those issues. They shouldn't exist, Apple would say. But they do.

That said, your best bet is jailbreaking and getting SBSettings to "Free Memory" or some specific app that does it, such as MemTool. I've just installed it on mine through hackyouriphone repo, but you can also find it on http://ispaziorepo.com/cydia/apt/

OSX Applications come in a .bundle file which is basically like a ZIP or other archive file in that it's actually a sort of folder. In that way all of your program files and dependencies are in one, neat package. Sometimes, though, other information like preferences will be stored throughout the system. Typical places to look are /Library and /Users/(user)/Library. Warning - do NOT delete anything unless you really, really want to mess something important up. If you have a legitimate concern I would suggest contacting the developer and asking for assistance.