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. Released on A DOS Emulator based on dosbox. An elder brother of iDOS, known as DOSPad, is living inside Cydia space.

Write Only. A minimalistic typewriter app for iOS.

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