Here are 4 things I made that are being used by more than 400 people a day. All them are my own work, bar Kittysplit which is a collaboration.
Kittysplit is a webapp that allows painless cashing up after an event. It was launched in 2012.
I've made a bunch of wallpaper apps for your Android phone. They've been download over 300 000 times! Can you really afford to continue living without them?
A nifty little webapp for keeping track of scores online.
A silly Android app that allows you to send mild spoken insults to your friends and enemies.