Tmux is a shell terminal multiplexing, that is a tiling window manager for the terminal.
Ranked in these QuestionsQuestion Ranking
Pro Preserve the state
As long as you don't close your session, you may even lose your SSH connection, it'll keep your state just as it was. So you can resume where you left off (via
Pro Maximize screen space
As a tiling window manager, it'll make use of all the space. As you have multiple workspaces and you can resize, etc. you can adjust to see what matters most.
Pro Easily split panes
There is a keyboard shortcut that makes it easy to split a window and create more panes.
Pro Mouse support
Mouse support can optionally be enabled, allowing e.g. scrolling with the mouse wheel, or switching panes with mouse clicks.
Pro Frequently updated
Tmux is in a state of constant development. Updates are frequent and bug reports usually get an answer within days.
Con No builtin telnet or serial support
It's considered bloat by the maintainers and for this reason there's no builtin support for them.