Some of the apps I have made. See complete list of apps in iOS AppStore and Google Play.

TeX Writer. TeX/LaTeX Editor and Compiler for iOS and Android.

Golden Ear. A Lossless Music Player for iOS.

iDOS, also known as DOSPad. A DOS Emulator based on dosbox.

AEMULA, 80486 PC Emulator for ARM. Written from sratch.

Write Only. A minimalistic typewriter app for iOS.

TeX Equation. Typeset equation on iPad and paste into Pages/Keynote. For people working with formulas.