In my spare time I play games like World of Warcraft. World of Warcraft has a built-in scriptable interface layer (running in LUA), enabling third-party-developers like myself to enhance my own userexperience by writing addons to tweak the interface of the game.

I have made a game-engine in javascript for simple clicker-games here (no live demo), generic enough to enabling anyone to create new levels through json config files

I've also dabbled in AutoHotKey, and finished a project that lets you mute the current application (i.e the application in focus) through a hotkey. Repo link here

Here is an example of a simple php-based backend api + frontend ui for voting on questions (simple 'this or that').