- Collates Request For Comments documents. Explains the RFC process, and includes a searchable database of RFCs.
Active IETF Working Groups - - A directory of the Internet Engineering Task Force groups and their web pages.
Free Protocols Foundation - - Independent public forum supporting patent-free protocols. Includes policies, papers, a mission statement, and a list of free protocols.
Internet2 - - A consortium led by universities working in partnership with industry and government to develop and deploy advanced network applications and technologies, accelerating the creation of tomorrow's Internet.
Internet protocols - General comments on protocol design, and good reference material on a few protocols (especially mail-related; also ftp, time, and misc) by Dan Bernstein.
The Kermit Project - - A protocol that transfers text and binary files without errors between diverse types of computers over potentially hostile communication links, and a suite of communications software programs; Columbia University.
RFC Sourcebook - - Description of protocols, file formats, glossary of terms, RFCs.
XNS.org - - Independent organization managing the eXtensible Name Service, an open protocol and open-source platform for universal addressing, automated data exchange, and privacy control. Includes an overview, charter, history, and specifications.