i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
Usersnap - Usersnap is a customer feedback software for SaaS companies that need to constantly improve and grow their products.
awesome - A dynamic window manager for the X Window System developed in the C and Lua programming languages.
Jira - The #1 software development tool used by agile teams. Jira Software is built for every member of your software team to plan, track, and release great software.
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.
Redmine - Flexible project management web application