I maintained a small utility that can be used to manipulate NSS databases (essentially a copy of the security management user interface built into the Mozilla applications) called NSS-GUI.
I created a couple of Add-Ons for Firefox, for example to keep the Padlock icon alive, or to make it easier for people worried about governmental Conspiracy to detect them more easily, to keep the list of previously visited pages easily discoverable in the Firefox user interface, or to help those who really really really want to accept bad SSL server certificates easily.
A long time ago I wrote an article how to use a 3G/UMTS data card with Linux.
I wrote a small utility to synchronize two directory trees by moving files, avoiding unnecessary copies. You still need to combine it with rsync afterwards, but I think it's helpful. It's called MoveSync. Warning, it doesn't have a GUI, it's a command line utility.
A very very long time ago I helped out a little around stunnel and sslproxy, and I have some old information on that.
In 2003 I tried to enable users of old Mac hardware, running only the classic Mac OS software, to keep using their hardware for a little longer, by giving them a modern build of Mozilla software for their computer. I had called that software WaMCom.
Like many people I sometimes make digital pictures. A long time ago I wrote a minimalistic tool called mvcren to manage copying files from Floppy Disk :) and more recently, I did a little fork of a similar utility called cpc, which I slightly improved and called my derivate work campico.
I have some very old, very small C++ snippets, which I'm only keeping here for sentimental reasons.
A routing diagram for a sound card called ews64 which I happened to use for a very short time.
Also here are some old linux isdn scripts, which today probably aren't of much use any more.
My vision from 1994 of a dynamic information management system :) (Although I'm a critic of Google, I'm thankful that they are keeping the historic newsgroup discussion archives alive, when AltaVista stopped to.)
A small utility named dirage that will recursively search through a directory tree and show the names of the oldest and newest files.