* Some libraries from my work with Java™ (Software Defined Radio, arbitrary precision math, a password generator, ...).   Just take a look around.
* The same as above but from my work with the Arduino™ µ-controller. Libraries, sample sketches but also fully   documented projects (e.g. a Nixie tube clock, the already mentioned WSPR beacon, a GPS outdoor unit transmitting   telemetric data, various GPS clocks and lots of general purpose libraries).