LockMeBaby is a small GUI for "chflags uchg/nouchg" command that actually lock/unlock files.
By selecting files/folders you want to lock (or unlock) in the file browser (yes, you can make multiple selections), you can make it with just a few mouse clicks instead of the tedious operation that is; opening info window and clicking "Locked" checkbox for each of the files.
This app allows you to encrypt all data sent over the internet from your Mac.
