Other Stuff
Check out our JavaScript enabled Julian Day and Civil Date Calculator. If you like it, feel free to copy its source code to your own Web page. This page uses JavaScript ports of the NR routines caldat and julday and does not require any CGI script at the server end!
We maintain on this web site an area for contributions from users of Numerical Recipes. If you'd like to contribute something, contact us through our web contact page.
When you need mathematical software that can be freely redistributed as source code (which Numerical Recipes can't), a good place to look is Netlib. Within Netlib, the SLATEC package offers a comprehensive collection of (alas, Fortran only) source code.
Here some links to other sites, with an emphasis on mathematical software.
Some of us are fans of the There.com metaverse game. Here are some links
Many Numerical Recipes readers are also interested in the Chemehuevi language ;)