Atom Publishing Format and Protocol (atompub)
Calendaring and Scheduling Standards Simplification (calsify)
Email Address Internationalization (eai)
Enhancements to Internet email to Support Diverse Service Environments (lemonade)
Sieve Mail Filtering Language (sieve)
Widget Description Exchange Service (widex)
Groups that did not meet at IETF 66
Cross Registry Information Service Protocol (crisp)
Internet Message Access Protocol Extension (imapext)
Language Tag Registry Update (ltru)
Open Pluggable Edge Services (opes)
Usenet Article Standard Update (usefor)
WWW Distributed Authoring and Versioning (webdav)