Android

Error Propagation Calculator
App which calculates the propagation of uncertainty in any formula.

Overtone Lab
App which compares instruments and voices using overtone analysis.



General

Online Partitur Player
Audio, video, text and full score - the Online Partitur Player (OPP) allows you to get all aspects of a musical piece at a glance.

commentor
Simple but powerful PHP comment system with spam protection that does not require MySQL.

Crossword Geometry Solver
Python script which tries to solve crossword puzzles by geometry only. (experimental)

newstrend-analyzer
Tool that tracks the online popularity of keywords on websites.

Textanalyzer
Online-Tool for text analysis

Textfinder
Online-Tool zum Finden von lateinischen Textstellen mit Vokabeln

viscounter
PHP based minimalistic hit counter for websites.



Games

Towerx
Air traffic control simulation game written in Python. (currently not being maintained)