PyMETAR is a Python module that provides easy access to NOAA's METAR weather reports.
avt is a collection of command line tools for aviation. They allow you to get METARs, TAFs, sunrise and sunset, and geo info, and decode IATA/ICAO airports, airline codes, aircraft tail codes, and aircraft names.
A tool for figuring out who pays what to whom after a series of transactions among members of a group.
A heterogeneous set of I2C tools for Linux.