XEPSupportNotes
XEP-0004: Data FormsYes
XEP-0009: Jabber RPCUnknown
XEP-0012: Last ActivityYes
XEP-0016: Privacy ListsYes Simplified for common users
XEP-0022: Message EventsNo
XEP-0030: Service DiscoveryYes
XEP-0045: Multi-User ChatYes
XEP-0047: In-Band BytestreamsYes
XEP-0048: BookmarksYesImplemented version 1.0 using Private XML Storage, not the current PEP-based specification
XEP-0049: Private XML StorageYesFor Bookmark Storage & Metacontacts
XEP-0050: Ad-Hoc CommandsYes
XEP-0054: vcard-tempYes
XEP-0055: Jabber SearchYes
XEP-0065: SOCKS5 BytestreamsYes
XEP-0066: Out of Band DataNo
XEP-0070: Authenticating HTTP Requests via XMPPYes
XEP-0071: XHTML-IMPartial
XEP-0076: Malicious StanzasYes
XEP-0083: Nested Roster GroupsNo#82
XEP-0085: Chat state notificationsYes
XEP-0086: Error Condition MappingsUnknown
XEP-0090: Entity TimeYes
XEP-0091: Delayed DeliveryYes
XEP-0092: Software VersionYes
XEP-0095: Stream InitiationUnknown
XEP-0096: File TransferYes
XEP-0105: Tree Transfer Stream Initiation ProfileUnknown
XEP-0106: JID EscapingUnknown
XEP-0107: User MoodYes
XEP-0108: User ActivityYes
XEP-0115: Entity CapabilitiesYes
XEP-0118: User TuneYes
XEP-0126: InvisibilityYes
XEP-0135: File SharingUnknown
XEP-0144: Roster Item ExchangeYes
XEP-0145: AnnotationsNo
XEP-0146: Remote Controling ClientsYes
XEP-0147: XMPP URI Scheme Query ComponentsYes#251
XEP-0153: vCard-Based AvatarsYes
XEP-0154: User ProfileNo
XEP-0155: Stanza Session NegotiationNo
XEP-0156: Discovering Alternative XMPP Connection MethodsYes#134
XEP-0162: Best Practices for Roster and Subscription ManagementUnknown
XEP-0163: Personal Eventing via PubsubNo
XEP-0166: JingleNo
XEP-0167: Jingle RTP SessionsNo
XEP-0172: User NicknameUnknown
XEP-0174: Link-local messagingNo#15
XEP-0176: Jingle ICE-UDP Transport MethodNo
XEP-0177: Jingle Raw UDP Transport MethodNo
XEP-0181: Jingle DTMFNo
XEP-0184: Message ReceiptsYes
XEP-0186: Invisible CommandNo
XEP-0191: Simple Communications BlockingNo
XEP-0194: User ChattingUnknown
XEP-0195: User BrowsingNo
XEP-0196: User GamingNo
XEP-0197: User ViewingNo
XEP-0198: Stanza AcknowledgementsNo
XEP-0199: XMPP PingYes
XEP-0202: Entity TimeYes
XEP-0203: Delayed DeliveryYes
XEP-0206: XMPP Over BOSHYes
XEP-0209: MetacontactsUnknown
XEP-0211: XMPP Basic Client 2008Unknown
XEP-0213: XMPP Intermediate IM Client 2008Unknown
XEP-0219: Hop CheckNo
XEP-0221: Data Forms Media ElementNo
XEP-0222: Persisting Objects via PubsubNo
XEP-0223: Private Information via PubsubNo
XEP-0224: AttentionYes Plugin
XEP-0226: Message Stanza ProfilesUnknown
XEP-0231: Bits of BinaryUnknown
XEP-0234: Jingle File TransferUnknown
XEP-0249: Direct MUC InvitationsNo

Other protocolsSupportNotes
File Transfer PreviewYes
S5B optimizing extensions for JabberNoPsi supports the 'fast' mode.