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