Gajim support status for various XEPs

XEP	Support	Notes
XEP-0004 Data Forms	Yes	jid and jid-multi are missing
XEP-0012 Last Activity	Yes
XEP-0016 Privacy Lists	Yes
XEP-0022 Message Events	Yes	composing event only
XEP-0030 Service Discovery	Yes
XEP-0045 Multi-User Chat	Yes	all basics stuff are in and some more advanced stuff like invitations, creations of rooms etc
XEP-0047 In-Band Bytestreams (IBB)	No	Not needed, we use XEP-0065 for bytestreams. See #2331
XEP-0048 Bookmark storage	Yes
XEP-0049 Private XML Storage	Yes	For Bookmark Storage & Metacontacts
XEp-0050 Ad Hoc command	Yes
XEP-0054 vcard-temp	Yes	all fields
XEP-0055 Jabber Search	Yes
XEP-0065 SOCKS5 Bytestreams	Yes
XEP-0066 Out of Band Data	No	no support for urls in single messages
XEP-0070 Authenticating HTTP Requests via XMPP	Yes
XEP-0071 XHTML-IM	Partial	Receiving and displaying works, sending only via reStruct generator
XEP-0085 Chat state notifications	Yes	all chatstates supported
XEP-0086 Error Condition Mappings	Partial	//XXX: we need to take action upon every possible error
XEP-0090 Entity Time	Yes
XEP-0091 Delayed Delivery	Yes
XEP-0092 Software Version	Yes
XEP-0095 Stream Initiation	Yes
XEP-0096 File Transfer	Partial	Complete implementation requires XEP 0047
XEP-0105 Tree Transfer Stream Initiation Profile	Unknown
XEP-0107 User Mood	Yes
XEP-0108 User Actity	Yes
XEP-0115 Entity Capabilities	Yes	Version 1.5
XEP-0116 Encrypted Sessions	Yes	#544
XEP-0118 User Tune	Yes
XEP-0135 File Sharing	No
XEP-0145 Annotations	Yes
XEP-0146 Remote Controling Clients	Yes
XEP-0153 vCard-Based Avatars	Yes
XEP-0162 Best Practices for Roster and Subscription Management	Yes
XEP-0163 Personal Eventing via Pubsub	Yes
XEP-0172 User Nickname	Yes
XEP-0174 Link-local messaging	Yes
XEP-0184 Message Receipts	Yes
XEP-0199 XMPP Ping	Yes
XEP-0202 Entity Time	Yes

P.S. this page always refers to svn version of Gajim

P.P.S. Gajim may support more XEPs which we may have forgotten to list (XEPs are many)