I'm working on a tabbed console-based editor that doesn't want to be vim. Like micro, only lighter and with a few extras like multiple cursor support.
I like to restore old (90's) computers for fun, and realized that if I wanted to actually use them for something, at the very least I needed a decent code editor that would run on them -- i.e. use at the very most 5-10 megs or RAM.
It's not 100% yet, but it's quite usable right now and works both in Linux and macOS. I actually had to fork the termbox library in order to get keybindings working correctly across different terminal emulators (xterm, urxvt, gnome/xfce term, OSX, etc).