René Schümann

T-Clock. Highly configurable Windows taskbar clock

WinMTR. WinMTR Redux, extended fork of Appnor's WinMTR with IPv6 support and other enhancements

sorttable.js. enhanced fork of http://kryogenix.org/code/browser/sorttable/

pwnat. pwnat punches holes in firewalls and NATs allowing any numbers of clients behind NATs to directly connect to a server behind a different NAT with no 3rd party, port forwarding, DMZ or spoofing involved