stagetimer.io - A speaker timer in the Cloud
TripleA - TripleA is a free (under GPL) turn based strategy game based on Axis & Allies board game.
Countdown Screensaver - A Mac screensaver for counting down to a date 🖥🕐
Particlescape - Particlescape app lets you create stunning patterns at your fingertips.
Countdown to Inbox Zero - Always respond on time
Fluid dynamics - Fluid dynamics developed and published by Reinder Nijhoff.