Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.

C++ - Has imperative, object-oriented and generic programming features, while also providing the facilities for low level memory manipulation

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.

Drift - A messaging app that helps you grow your business.

Openbox - Openbox is a highly configurable, next generation window manager with extensive standards support.