1- I'd like to build a simple alarm clock using Omega2+.
It would display the current time in a 16x02 common "arduino display" (using Expansion board's GPIO), a common buzzer and blinking the Expansion board's built-in RGB LED.

2- Build a level gauge for a tank.
Where it can distinguish other and "heavier" liquids (in general, matte one) than upper water liquid (transparent one), measuring height of the "heavier" liquid without reporting the water height, just the other liquid.