Ham Vocke is a software developer who writes about tmux, terminal color schemes, pair programming and pragmatic software engineering.
Commenters link his tmux guides, especially for sharing sessions in remote pair programming, and his terminal color scheme post drew attention as a neat find.
Not my site, but I stumbled onto it from another submission earlier and thought it was neat and deserved some attention. Noticed it from this submission: https://hamvocke.com/blog/lets-create-a-terminal-color-scheme/
If you're working on the same machine (say via SSH) you can also share a session with tmux.
https://www.hamvocke.com/blog/remote-pair-programming-with-tmux/
http://hamvocke.com/blog/remote-pair-programming-with-tmux/ it describes tmux setup, but screen can do it as well - there are guides online.
Some personal stuff, some tech stuff: https://hamvocke.com