I have made a few things that people have found useful and/or fun.
Here's an annotated bibliography of sources that connect computer programming to literacy. (I originally made it available on Scribd, but then they started charging for access.)
For the 2008 Watson Conference at the University of Louisville, I developed this conference paper title generator site to demonstrate how fun and productive even simple web scripts can be. Type in your topic, and the site will give you a composition and rhetoric conference paper title, complete with colon, parentheses, and scare quotes!
I designed the blogs! tools for teaching site in 2006 to help college writing teachers use blogs productively in their classes. At the time, there were not as many straightforward yet comprehensive resources available on teaching with blogs. Several people at the UW and elsewhere have told me they found the site useful as they began teaching writing with blogs.
The free resources online site gathers many of the online resources available for copyright-free or creative commons-licensed resources. It's particularly geared towards the teaching, research, and presenting that academics do. I presented it at the CCCC Computer Connection in 2008.
I co-produced this streamlined guide to fun stuff on the internet for my mom for Christmas 2008. It includes links to free university lectures, news sites, podcasts and other free goodies offered by the web.