First thing is Visor – an extension for the Terminal.app which offers a so called Quake-style Terminal window. When installed, Visor offers a global keyboard shortcut which opens a Terminal window. The Terminal window will slide in from the top of the screen. Another hot key stroke will hide this Terminal window again.
The second application from Blacktree is Nocturne. This will change your screen colors to a black/white screen for simulating kind of night vision:
The switch from day to night mode can be done automatically by sense of the light sensors of the MacBook Pros.