Dual file manager is a very powerful utility for not only managing your folders but thanks to its embedded features such as ...
*. Thumbnail generating for apk, audio and videos...
*. Zip file handling (Zip, gZip and Tar).
*. Search for files within archives.
*. Bookmark files.
*. Sort (with different views, etc).
*. Dual screen ability.
*. Check archive integrity.
*. Open files with different apps.
These are some of the main functions. But unless you're a power user I don't think you're gonna need to bother with the Dual file manager. Anyhow for all you nerdy experimenting (yikes ;-) ) geeks go to this market page for more.