RFC Editor Collates Request For Comments documents. Explains the RFC process, and includes a searchable database of RFCs. http://www.rfc-editor.org/

IETF Internet Drafts List of documents organized by alphabetized subjects. http://www.ietf.org/1id-abstracts.html

Active IETF Working Groups A directory of the Internet Engineering Task Force groups and their web pages. http://www.ietf.org/html.charters/wg-dir.html

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. ftp://koobera.math.uic.edu/www/proto.html

Port Numbers and Services Database Well known port numbers for TCP and UDP, from Internet Assigned Numbers Authority (IANA). http://www.sockets.com/services.htm

RFC Sourcebook Description of protocols, file formats, glossary of terms, RFCs. http://www.networksorcery.com/enp/

Protocols.com Features an overview of various networking and mobile communications protocols, white papers, and links of interest. http://www.protocols.com/

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. http://www.xns.org/

Internet Encyclopedia Overview of Internet protocols. http://www.freesoft.org/CIE/Topics/73.htm

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. http://www.kermit-project.org/

Free Protocols Foundation Independent public forum supporting patent-free protocols. Includes policies, papers, a mission statement, and a list of free protocols. http://www.freeprotocols.org/

The Internet Report (IETF Weekly Updates) A table of new Internet Drafts and RFC's that come out each week, with synopses. Archived summaries go back to June 1999. http://ietfreport.isoc.org/

Debian GNU/Linux: gopher Distributed hypertext client, gopher protocol. Supports gopher+ protocol. http://packages.debian.org/stable/net/gopher