DiskWave is a free disk usage utility for Mac OS X. It helps determine what files and folders consume most of disk space.
Exposition is an open source modern HTML 5 photo gallery software. It is written in TypeScript and PHP.
German Language Resources
This is a website containing a collection of resources I have gathered while attempting to learn the German language.
Presentation about Cryptography: slides.
The 2 hour talk covers cryptographic hashes, symmetric ciphers, and random number generators. It shows how the primitives are implemented and explain how to use them. It also includes examples of misuse and practical attacks, performed on a whiteboard.