Gajim support status for various XEPs

XEPSupportNotesXEP Status
 XEP-0004 Data FormsYesjid and jid-multi are missingFinal
 XEP-0012 Last ActivityYesFinal
 XEP-0016 Privacy ListsYesDraft
 XEP-0022 Message EventsYescomposing event onlyObsoleted, see XEP-0085 and XEP-0184
 XEP-0027 Current Jabber OpenPGP UsageYesActive
 XEP-0030 Service DiscoveryYesFinal
 XEP-0045 Multi-User Chat Yesall basics stuff are in and some more advanced stuff like invitations, creations of rooms etcDraft
 XEP-0047 In-Band Bytestreams (IBB)NoNot needed, we use  XEP-0065 for bytestreams. See #2331Draft
 XEP-0048 Bookmark storageYesDraft
 XEP-0049 Private XML StorageYesFor Bookmark Storage & MetacontactsActive
 XEp-0050 Ad Hoc commandYesDraft
 XEP-0054 vcard-tempYesall fieldsActive
 XEP-0055 Jabber SearchYesActive
 XEP-0065 SOCKS5 BytestreamsYesDraft
 XEP-0066 Out of Band DataNono support for urls in single messagesDraft
 XEP-0070 Authenticating HTTP Requests via XMPPYesDraft
 XEP-0071 XHTML-IMYesDraft
 XEP-0085 Chat state notificationsYesall chatstates supportedFinal
 XEP-0086 Error Condition MappingsPartial//XXX: we need to take action upon every possible errorDeprecated, see XMPP Core
 XEP-0090 Entity TimeYesObsoleted, see XEP-0202
 XEP-0091 Delayed DeliveryYesObsoleted, see XEP-0203
 XEP-0092 Software VersionYesDraft
 XEP-0095 Stream InitiationYesDraft
 XEP-0096 File TransferPartialComplete implementation requires XEP 0047Draft
 XEP-0105 Tree Transfer Stream Initiation ProfileNoDeferred
 XEP-0107 User MoodYesDraft
 XEP-0108 User ActivityYesDraft
 XEP-0115 Entity CapabilitiesYesVersion 1.5Draft
 XEP-0116 Encrypted SessionsYes#544Deferred, see XEP-0210
 XEP-0118 User TuneYesDraft
 XEP-0135 File SharingNoDeferred
 XEP-0144 Roster Item ExchangeYesOnly addition part, not deletion and modificationDraft
 XEP-0145 AnnotationsYesActive
 XEP-0146 Remote Controling ClientsYesActive
 XEP-0153 vCard-Based AvatarsYesActive
 XEP-0158 CAPTCHA FormsPartialImages onlyDraft
 XEP-0162 Best Practices for Roster and Subscription ManagementYesDeferred
 XEP-0163 Personal Eventing via PubsubYesDraft
 XEP-0172 User NicknameYesDraft
 XEP-0174 Link-local messagingYesFinal
 XEP-0175 Best Practices for Use of SASL ANONYMOUSYesActive
 XEP-0178 Best Practices for Use of SASL EXTERNAL with CertificatesYesActive
 XEP-0184 Message ReceiptsYesversion 1.1Draft
 XEP-0199 XMPP PingYesFinal
 XEP-0202 Entity TimeYesDraft
 XEP-0203 Delayed DeliveryYesDraft
 XEP-0221 Data Forms Media ElementPartialimage onlyDraft
 XEP-0231 Bits of BinaryPartialno cache: useless for captchaDraft
 XEP-0237 Roster VersioningYesDraft
 XEP-0258 Security Label in XMPPYesDraft

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

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