This is a list of tools that I use and abuse on a regular basis for different purposes. Most of them are console based simply because I spend 90% of my time in a terminal.
tmux: terminal multiplexer. THE one I use basically everywhere, love it because it stays out of the way. I used to have GNU screen on all my machines but got seduced by the flexibility of tmux (client-server model, scriptable), never looked back after getting used to hit Ctrl-b.
goaccess: a real time web log analyzer