Visor – Systemwide Terminal Access via Hotkey
For those of us who have ever played Quake, this is an easy one to explain. Remember hitting the tilde (~) key would bring down the Quake terminal? Well that is what Visor does for Mac OS X. You assign a hotkey, and when Visor is triggered, a nice Terminal slides out of the top of the screen for immediate use. Is this cool or what? Visor requires SIMBL, Mac OS X 10.4 or higher, and Quartz support.
Installation instructions [via Developer's home]:
1) Install SIMBL. More information about SIMBL can be found here.
2) Place Visor.bundle in ~/Library/Application Support/SIMBL/Plugins
3) (Re)launch Terminal.app – You should now see the Visor menu item.
4) Configure your keyboard trigger by selecting the visor menu item → preferences and editing your keyboard hotkey. Optionally choose a quartz file to be placed in the background of your Visor terminal session.
5) You can now trigger Visor with your hotkey from any application to get an instant terminal session. To exit Visor, you can either re-trigger with your key-combo, use the logout key-combo (control+d) to close the Visor window and close the current shell or optionally you can click off of the Visor window. When re-triggering Visor you will be greeted with a new login shell (if you closed your session), or your old shell if you simply disabled Visor.