Roxen WebServer - A powerful, modular web server developed by Roxen Internet Software, written entirely in Pike. It was named Roxen Challenger before version 2.0. - http://download.roxen.com/3.3/
Roxen Community - Community for Roxen users and developers, based on the LysKOM conference system. Still in early alpha, so expect occasional bugs and crashes. Includes a Pike programming conference, of course. - http://community.roxen.com/
Pike 7.0 Tutorial - A good beginners guide to Pike programming, written by Thomas Padron-McCarthy. - http://docs.roxen.com/pike/7.0/index.html
RMS: Roxen Module Source - The place to go when you need a Roxen module of any kind. Features discussion, information, and resources for Roxen users. - http://source.riverweb.com/
Pike Manuals - Manuals for Pike built from the sources. - http://pike.oav.net/