Using GitHub is an integral part of any project: starbuck93.
Using Corona SDK, I have an app on the Google Play Store and (back in 2015) web apps in development.
Discovering home automation was fantastic, but there was no desktop UI for actually turning WeMo lights on and off. So we figured out after a lot of research that we could indeed control our lights from a website that we built and hosted locally.
Building a Chrome and corresponding Firefox extension to skip linked-advertisements.
This project ended in 2016, but it was really neat to see a few hundred people using a tiny service.
Also, using Framework7, I built a web based mobile app for PrimeTime FEC Employees to solve a few problems with keeping track of error reporting and other procedures around the workplace.
I made this in one day to facilitate the scorekeeping of one of my family's favorite games called "Golf". There is one scorekeeper and everyone else can watche the scores from round to round. Then after the game is over, you can go back and view previous games that have been played.
Here's a live preview. This does not work anymore, unfortunately. But thankfully the Pi Zero is widely available now.
This used to allow you to get a notification when the stock goes above zero!