Fanly - Keep up with all of your favorite sports teams
Grin Gaming - Grin Gaming is an adrenaline-inducing prediction app where you can win cash by answering simple questions during live events.
Starters - Hacker news for sports tech
CAMelot - PDF table extraction for humans
OverTime - Easy time-overlap tables for remote teams.
The Prediction Game - Predict what'll happen in 2021, win a $1k fund :)