Specification for Fault Code Interoperability - Standard Error Codes in XML-RPC

The Fantabulous Icon-O-Matic! - Icon Builder on the web

PyWX: Python for AOLserver - Embed Python in AOL Server as an alternative to TCL

Generic SOAP Client - Generic SOAP client with WSDL support for testing

WAVE 3.0 - Web Accessibility Versatile Evaluator - Useful accessibility tester

Mod-pubsub blog - Infrastructure for Publish Subscribe with Websites

RFC: Subscriptions harmonizer - Synchronization of blog rolls via XMLRPC

Cacheability Engine - Analysis tool for cache suitability of websites

Apple - RSS Information - Directory of Apple's RSS feeds

XML-RPC Client/Server Protocol Reference - LiveJournal XML RPC API

myelin: Feed Normalizer - Normalizer for feeds - can also convert Atom to RSS

del.icio.us API documentation - An API to access data from del.icio.us (social bookmarking service) and send new bookmarks

RFC 1864 (rfc1864) - The Content-MD5 Header Field - Securing content against loss using MD5

DevChannel | The Affero GPL: Closing the Distribution Loophole - License specifically for web services - Network operation is equated with distribution

XML.com: Lightweight XML Search Servers [Jan. 21, 2004] - XML search servers as standalone web servers in Python

Tapestry - Your Favourite Comics by RSS | dwlt.net - Various web comics via RSS

VPWiki Spec 0.1 - VoodooPad Wiki API

LinkTagMeaning - Atom Wiki - Collection of link tag variants in Atom

Blogger API - Blogger API documentation

RFC: MetaWeblog API - Documentation of the MetaWeblog API

RFC: Really Simple Discoverability 1.0 - Description of Really Simple Discoverability

freshmeat.net: freshmeat - freshmeat XML-RPC API available - Freshmeat has an XML-RPC interface to access project data