Sorry, but I had to close this thread. First, there is already an app discussion thread here and this thread was already being dominated by 1 or 2 word answers...and a list of File Managers isn't really that helpful to anyone.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?