Here are some miscellaneous hobby projects I've worked on:

2016 vscoq An extension for vscode that provides an IDE for interactive, asynchronous proofs in the Coq proof assistant. (Typescript)
2016 Prettify symbols mode [github] An extension for vscode to change how user-specified keywords and symbols are rendered, e.g. by replacing them with nicer-looking unicode symbols. Inspiration comes from the original prettify-symbols-mode of Emacs 24.4. (Typescript)
2012Instrument/pitch tuner Software for tuning musical instruments. Fun with time-domain signal processing. (C#)
2012 OCRSearch A mobile app that lets a user take pictures and automatically highlights any occurrences of search terms. (C#)
2011 Cuties A mobile game that mixes Tamagotchi digital pets with travelling gnomes. (C#)
2006 InkTactics A TabletPC stylus-based real-time strategy game; team project. (C#)
2006 Reverse engineering Wrote an SD card driver for homebrew programs on the Nintendo DS. (ARM)
2003 Reverse engineering Created an IR remote control interface by reverse-engineering its drivers. (x86)
2000-2002 Grapher A graphing calculator. Achievements: N-space projection, more than 10,000 downloads and translations into a few foreign languages. (C,Win32)