- gpsbabel python scripting + bridging with igc2kmz [source code (C/Python) part1/part2]
- parser for not-so-documented OpenAIR format (antlr grammar used mainly with python) [source code (python)]
- a first prototype using ad-hoc GIS data manipulation (shapely, rtree, geos/gdal) for loading airspace and computing infringing segments of a GPS track [source code (python)]
Of course, all the code related to the above items is being released as free software (mainly GPL, but not only).
The main result can be seen at http://airspace.kataplop.net/airspace/amap