TextMate, which is considered to be one of the best text editors for Mac, has gone open source. In less than 24 hours, over 500 branches/forks have already been created and many improvements are already landing into the codebase.
Terminator allows users to have multiple terminals in one window and use key bindings to switch between them. It provides an efficient way of filling a large area of screen space with terminals.
Guake is a drop-down terminal allowing you to invoke it with just a key press. Guake supports hotkeys, tabs, transparent background and many other features.
Gamecaster is a graphical user interface for open source project glc. It can capture real time footage of any Linux game that uses ALSA for sound and OpenGL for drawing.
Pythondoc is a useful Unity lens for developers. It can search official Python documentation at docs.python.org and open a relevant page in your default browser.