Insight Timer - Support your meditation practice through a massive community powered app.
i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
Meditation Assistant - Feature packed meditation session timer and recorder
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.
Headspace - Meditation made simple. Brilliant things happen in calm minds.
Openbox - Openbox is a highly configurable, next generation window manager with extensive standards support.