I write software since several years. Most of what I’ve done in my free-time is open-source. To give an overview about that I try to collect all the stuff here. It could take some time to find all of that again. But it will get more and more sometimes.
Springerlink Batchcreator a small greasemonkeyskript for firefox to create a batchlist for downloading books.
png2audioSpectrum is a tiny python script that converts png images (black/white at the moment) to an audio spectrum that looks like the image that you provided.