MobileFinder (strictly “Finder” in the iPhone’s springboard view) is a filesystem navigator and launcher for use with iPhones which have been jailbroken.

Features:
* Filesystem navigation with system file protection
* Icons differentiate different filetypes
* Copy, Move, Delete operations (requires that /bin/mv and /bin/cp be installed)
* File creation and renaming
* Application Launch – Also launches MobileStudio apps
* Executable launch (scripts, etc)
* Preferences screen with filesystem browse settings
* User modifiable associated file types that launch file viewers
* Open mode when launched by other apps in MobileStudio

http://code.google.com/p/mobilefinder/