Relief - The free app that gets rid of your credit card debt
i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
Digit - SMS bot that monitors your bank account & saves you money
dwm - dwm is a dynamic window manager for X. It manages windows in tiled, monocle and floating layouts. All of the layouts can be applied dynamically, optimising the environment for the application in use and the task performed.
Qapital - Qapital is an easy to use Finance application that allows you to save money automatically and take control of your spending.
Openbox - Openbox is a highly configurable, next generation window manager with extensive standards support.