Email Address Internationalization (eai)
Hypertext Transfer Protocol Bis (httpbis)
HTTP State Management Mechanism (httpstate)
Internationalized Domain Names in Applications, Revised (idnabis)
Enhancements to Internet email to Support Diverse Service Environments (lemonade)
Open Authentication Protocol (oauth)
Sieve Mail Filtering Language (sieve)
Virtual World Region Agent Protocol (vwrap)