Quite the virtuous circle Open Source is. Just as I post some of my work for others to freely use, here are some other scripts I use which are freely available:

Soupermail - This is an amazing and very powerful Perl script! I have used it for all sorts of forms on several websites. On this website I use it in conjunction with some Javascript I wrote for the contact form to prevent my email address(es) from being revealed and to give people an easy way to contact me. Sadly, it does not appear that Soupermail is undergoing further development.

AWStats - When I first started EricZander.com, I was very dissatisfied with my host's built-in stats program. I figured there had to be a better and free Perl script out there for analyzing my logs. AWStats is that program. It is very actively being developed and is very, very useful. Go check it out.

Pop-Up Windows - Just about everyone I know who knows Javascript well began their learning by copying other people's scripts. When I first used this script, it was way over my head - functions? DOM? I had no idea what they were! But I picked the script apart, played with it, modified it and learned a lot along the way. I use this script, along with some other Javascript I wrote to implement the contact form. And, anywhere there's a pop-up window on this site, it is powered by this script.

Count Down Timer - Found this JavaScript on the Chicago Marathon website. I'd rather write my own from scratch (and will at some point just as an exercise to keep my JS skills sharp) but right now just wanted to get a timer until graduation on the homepage.

Links - I implemented this on a different website a while back. Really liked it a lot and will implement it (or maybe something better's come out since then?) on my site at some point....