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
awesome - A dynamic window manager for the X Window System developed in the C and Lua programming languages.
Qapital - Qapital is an easy to use Finance application that allows you to save money automatically and take control of your spending.
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.