Micro : a modern and intuitive terminal-based text editor
Asciinema : Asciinema is a free and open source solution for recording the terminal sessions and sharing them on the web.
gopass : gopass is a simple but powerful password manager for your terminal.
Mosh : Remote terminal application that allows roaming, supports intermittent connectivity, and provides intelligent local echo and line editing of user keys...
present : A terminal-based presentation tool with colors and effects.
You can also play a codio (pre-recorded code block) on a slide.
eDEX-UI is a fullscreen, cross-platform terminal emulator and system monitor that looks and feels like a sci-fi computer interface.