16 Segment Black
This free online timer is a simple, but techie, 90 seconds timer features a black 16 segment LCD on a simple white background.
Great for helping students stay focused while they're working indendently or really any time that you need some help with focus.
Bright Painted Background
Digital Clock - Green
9 Pin White
16 Segment Blue
Digital Clock - Black
VT323 Digital Timer - Radical Red