XEP status in gabble
All XEP are available at: http://www.xmpp.org/extensions/
XEP-0004: Data Forms
- Implemented, used internally for MUC configuration, registration, etc
XEP-0020: Feature Negotiation
- Implemented, used internally for stream initiation
XEP-0030: Service Discovery (Disco)
- Implemented, used for capabilities, MUC room listing, discovering components, server features, etc
XEP-0045: Multi-User Chat (MUC)
- Implemented, chat and room configuration, missing role support
XEP-0047: In-Band Bytestreams (IBB)
- Implemented, used by tubes
XEP-0054: vcard-temp
- Implemented, used for avatars and nicknames, contact info is WIP
XEP-0055: Jabber Search
- WIP
XEP-0060: Publish-Subscribe (PubSub)
- Implemented partially, used internally for PEP
XEP-0065: SOCKS5 Bytstreams
- Implemented partially, used by tubes, relay support is WIP
XEP-0077: In-Band Registration
- Implemented
XEP-0080: User Location
- WIP
XEP-0084: User Avatar
- Implemented
XEP-0085: Chat State Notifications
- Implemented
XEP-0095: Stream Initiation
- Implemented, used by tubes
XEP-0096: File Transfer
- WIP
XEP-0115: Entity Capabilities
Version 1.3 (legacy format) implemented
- Version 1.5 implemented
XEP-0128: Service Discovery Extensions
- Implemented, used internally for MUC room listing and configuration
XEP-0153: vCard-based Avatars
- Implemented
XEP-0163: Personal Eventing via Pubsub
- Implemented, used internally for nicknames, location, avatars, OLPC extensions, etc
XEP-0166: Jingle
- Implemented (mid-2007 and current drafts), used for audio/video calls
XEP-0167: Jingle RTP Sessions
- Implemented (mid-2007 and current drafts) implemented, used for audio/video calls
XEP-0172: User Nickname
- Implemented
XEP-0174: Serverless Messaging
Implemented in Salut
XEP-0176: Jingle ICE-UDP Transport
- WIP
XEP-0177: Jingle Raw-UDP Transport
- WIP
XEP-0249: Direct MUC Invitations
- Implemented
Vendor Extensions
- Google Session (Voice and Video)
- Similar to Jingle
- Google P2P Transport
- Similar to ICE
- Google Jingle Info
- STUN and relay server discovery
- Google Roster
- For blocking
- Telepathy
- Tubes
- MUC bytestreams
- SI multiple (for falling back between SI methods)
- OLPC
- Buddy and Activity Info
- Gadget (server component for indexing buddies and activities)
Note
This list is far for being complete, feel free to add informations

