Stand here, my current (and ex-) personal projects...
MerRe -A page for collecting and illustrating meteorology and airspace information primarily for planning paragliding flights, extended by some seemingly useful applications.
URAN-project -A simple timetable and note organiser, to compensate the NEPTUN system's bugs (currently unavailable due to server capacity shortage, sry - promise it exists!).
On the wings of the wind -Contribution as an expert to a somewhat significant book on paragliding
And a few more on GitHub