Project page: https://github.com/kovidgoyal/kitty
Why: kitty is an OpenGL-based terminal emulator with built-in support for multiplexing like tmux, tabs, truecolor, and advanced features like startup sessions. Because it uses OpenGL, it's easier on the CPU. The UI is written in Python and supports extensions like new window layouts through it.
Open source? GPL v3.0.
Latest release: https://github.com/kovidgoyal/kitty/archive/v0.3.0.tar.gz
I just built kitty against glew 1.12 and it built just fine.
Looking through the changelog, it appears that glew is no longer a dependency as of release 0.5.0.
This commit is where they switched to using glad instead.