Squid

Squid: A User's Guide :

  - Oscar Pearson's guide to installing, configuring and running a Squid implementation.
Squid Web Proxy Cache :

  - Official site. FAQs, configuration guide, support documentation and downloads. [Unix, Linux]
Ad Zapping With Squid :

- A redirector for squid that intercepts advertising (banners, popup windows, flash animations, etc.), page counters and some web bugs (as found).
Squid for Windows :

- Version of Squid written for Windows operating systems. Free download.
Squid: The Definitive Guide :

- Advertising site for a book on Squid, written by Duane Wessels. Offers chapter summaries, reviews and purchase locations.
Squid-cache.org: Hypermail Archive :

- All squid mailing list entries from current day back to May 1996.
Squirm :

- A flexible regex based redirector for Squid.
Transparent proxying with squid and pf :

- Instructions on how to use OpenBSD packet filter (pf) to redirect http connections to a squid cache transparently without any client configuration. [OpenBSD]
Devshed.com :

- Article on tuning Squid on Linux for maximum performance and stability. (September 11, 2000)