1* XEP-0027: Current Jabber OpenPGP Usage
 2* XEP-0030: Service Discovery
 3* XEP-0045: Multi-User Chat
 4* XEP-0048: Bookmarks
 5* XEP-0115: Entity Capabilities
 6* XEP-0163: Personal Eventing Protocol (avatars and nicks)
 7* XEP-0166: Jingle (only used for file transfer)
 8* XEP-0184: Message Delivery Receipts (reply only)
 9* XEP-0198: Stream Management
10* XEP-0234: Jingle File Transfer
11* XEP-0237: Roster Versioning
12* XEP-0245: The /me Command
13* XEP-0249: Direct MUC Invitations (receiving only)
14* XEP-0260: Jingle SOCKS5 Bytestreams Transport Method
15* XEP-0261: Jingle In-Band Bytestreams Transport Method
16* XEP-0280: Message Carbons
17* XEP-0313: Message Archive Management
18* XEP-0333: Chat Markers
19* XEP-0352: Client State Indication
20* XEP-0191: Blocking command