If you like sysutils/tmux try sysutils/byobu. In the default configuration it uses tmux as multiplexer, but it is much user friendlier to handle than tmux.I only discovered tmux recently and wished I had come across it years ago. I'm still finding my way around how to make the most of it.
For example:
Create new window:
tmux: Ctrl+b+c
byobu: F2
Cycle through windows:
Previous window:
tmux: Clrl+b+p
byobu: F3
Next window:
tmux: Ctrl+b+n
byobu: F4
Rename current window:
tmux: Ctrl+b+,
byobu: F8
F1 for TUI help (keybindings) and configuration menu, easy pre-defined status line configuration (not all available though). All key bindings can be custom defined, all tmux commands are accepted (as far I can tell).