So it took me 3 days, 2 really late nights (its 4 AM right now), but I finally have a stable and fully functional Document Encryptor. This application is a plugin-based encryptor that uses the rijndael encryption standard by default, but has a .h file included that details how to add additional plugins. Its written in native C++/winAPI so it should run on any windows version, but I haven't really been able to do extensive testing, so it might blow up for no apparent reason - I can post source code if anyone is interested. It also lets you associate .ef files with the executable for ease-of-use (now I know what registry entries are needed for that...)Document Encryptor
If you ask me "how do you use this program?" I'm going to smack you
It's like notepad, except it'll prompt you for a password every now and then.
EDIT: Update to v1.1.6