tilda terminal emulator - Tilda is a GTK+ terminal emulator.
DisplayFusion - DisplayFusion will make your multi-monitor life much easier.
Alacritty - Alacritty is a blazing fast, GPU accelerated terminal emulator.
WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.
Sakura - sakura is a terminal emulator based on GTK and libvte
Mizage Divvy - Divvy is an entirely new way of managing your workspace.