Taken from the Stjerm page: Stjerm is a GTK+-based drop-down terminal emulator similar to the consoles used in PC games such as Quake and Half-Life 2. Stjerm sets itself apart from similar programs by providing a minimalistic interface combined with a small file size, lightweight memory usage and easy integration with composite window managers such as Compiz.
Stjer not found in the official repositories, grab the latest version from the Downloads section and extract it to your hard drive. Then run:
./configure make make install (as root)
Stjerm can be configured via the terminal or through the .Xdefaults file located in your home directory. For example, to run stjerm with F12 as shortcut key, the opacity of 60 and a green foreground color, use:
stjerm -k f12 -o 60 -fg 66ff11
To specify the same options in the .Xdefaults file:
stjerm.key: f12 stjerm.opacity: 60 stjerm.foreground: #66ff11
For a complete list of options, see the ConfigurationOptions wiki page.