You can find a list of some sweet tools I made right here.

QuickSwap - a lightweight LAN filesharing tool
UDPFlood – a tool to test your network under heavy UDP-traffic
De-Hasher – a little MD5-dehashing bruteforce programm
NMS-Demo-Tool – a little tech-demo of the natural merge sort algorithm
TrayCloud – a lightweight Soundcloud desktop player
tCrypt – a simple file encryption tool
PPGV - a simple website porting our PDF school timetable directly into the browser of mobile devices without downloading

If you have ideas for other tools you ever wanted to have please let me know (see contact).
You may also like the Tutorials-Section where a bunch of useful code snippets and libraries are available.