i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
Annotate.tv - Optimize your learning on YouTube
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.
Slid - Capture knowledge from online videos, courses, and webinars
Openbox - Openbox is a highly configurable, next generation window manager with extensive standards support.
SkillTube - A curated list of best courses from YouTube & other platform