securewallet is a simple command line password manager. It uses 256-bit AES encryption to protect your data, and is completely open source, so you know what's going on. Feel free to download and edit a copy of the project - send me a mail at ritzymail@gmail.com and I'll probably add your changes if they make a difference in the app. The app should work on Linux (tested) and on Mac (untested) and requires Python and PyCrypto. Feel free to change anything if you want.
The first thing to do is install Python and PyCrypto.
curl -s http://online.ritwikd.com/ritwik/securewallet/raw/master/install/srcinstall.sh | sudo sh
curl -s http://online.ritwikd.com/ritwik/securewallet/raw/master/install/install.sh | sudo sh