| Nonzas | [XEP-0360](http://xmpp.org/extensions/xep-0360.html) | Defines the term "Nonza", describing every top level stream element that is not a Stanza. |
| [Stream Management](streammanagement.md) | [XEP-0198](http://xmpp.org/extensions/xep-0198.html) | Allows active management of an XML Stream between two XMPP entities (stanza acknowledgement, stream resumption). |
| Last Activity | [XEP-0012](http://xmpp.org/extensions/xep-0012.html) | Communicating information about the last activity associated with an XMPP entity. |
| Flexible Offline Message Retrieval | [XEP-0013](http://xmpp.org/extensions/xep-0013.html) | Extension for flexible, POP3-like handling of offline messages. |
| Extended Stanza Addressing | [XEP-0033](http://xmpp.org/extensions/xep-0033.html) | Allows to include headers in stanzas in order to specifiy multiple recipients or sub-addresses. |
| [Multi User Chat](muc.md) | [XEP-0045](http://xmpp.org/extensions/xep-0045.html) | Allows configuration of, participation in, and administration of individual text-based conference rooms. |
| In-Band Bytestreams | [XEP-0047](http://xmpp.org/extensions/xep-0047.html) | Enables any two entities to establish a one-to-one bytestream between themselves using plain XMPP. |
| Bookmarks | [XEP-0048](http://xmpp.org/extensions/xep-0048.html) | Bookmarks, for e.g. MUC and web pages. |
| User Location | [XEP-0080](http://xmpp.org/extensions/xep-0080.html) | Enabled communicating information about the current geographical or physical location of an entity. |
| Data Forms Validation | [XEP-0122](http://xmpp.org/extensions/xep-0122.html) | Enables an application to specify additional validation guidelines . |
| Service Administration | [XEP-0133](http://xmpp.org/extensions/xep-0133.html) | Recommended best practices for service-level administration of servers and components using Ad-Hoc Commands. |
| Personal Eventing Protocol | [XEP-0163](http://xmpp.org/extensions/xep-0163.html) | Using the XMPP publish-subscribe protocol to broadcast state change events associated with an XMPP account. |
| Message Delivery Receipts | [XEP-0184](http://xmpp.org/extensions/xep-0184.html) | Extension for message delivery receipts. The sender can request notification that the message has been delivered. |
| [Blocking Command](blockingcommand.md) | [XEP-0191](http://xmpp.org/extensions/xep-0191.html) | Communications blocking that is intended to be simpler than privacy lists (XEP-0016). |
| XMPP Ping | [XEP-0199](http://xmpp.org/extensions/xep-0199.html) | Sending application-level pings over XML streams.
| Entity Time | [XEP-0202](http://xmpp.org/extensions/xep-0202.html) | Allows entities to communicate their local time |
| Delayed Delivery | [XEP-0203](http://xmpp.org/extensions/xep-0203.html) | Extension for communicating the fact that an XML stanza has been delivered with a delay. |
| XMPP Over BOSH | [XEP-0206](http://xmpp.org/extensions/xep-0206.html) | Use Bidirectional-streams Over Synchronous HTTP (BOSH) to transport XMPP stanzas. |
| Best Practices for Resource Locking | [XEP-0296](https://xmpp.org/extensions/xep-0296.html) | Specifies best practices to be followed by Jabber/XMPP clients about when to lock into, and unlock away from, resources. |
| Last Message Correction | [XEP-0308](http://xmpp.org/extensions/xep-0308.html) | Provides a method for indicating that a message is a correction of the last sent message. |
| Message Carbons | [XEP-0280](http://xmpp.org/extensions/xep-0280.html) | Keep all IM clients for a user engaged in a conversation, by carbon-copy outbound messages to all interested resources. |
| [Message Archive Management](mam.md) | [XEP-0313](http://xmpp.org/extensions/xep-0313.html) | Query and control an archive of messages stored on a server. |
| [Internet of Things - Sensor Data](iot.md) | [XEP-0323](http://xmpp.org/extensions/xep-0323.html) | Sensor data interchange over XMPP. |
| [Internet of Things - Provisioning](iot.md) | [XEP-0324](http://xmpp.org/extensions/xep-0324.html) | Provisioning, access rights and user priviliges for the Internet of Things. |
| [Internet of Things - Control](iot.md) | [XEP-0325](http://xmpp.org/extensions/xep-0325.html) | Describes how to control devices or actuators in an XMPP-based sensor netowrk. |
| [HTTP over XMPP transport](hoxt.md) | [XEP-0332](http://xmpp.org/extensions/xep-0332.html) | Allows to transport HTTP communication over XMPP peer-to-peer networks. |
| Chat Markers | [XEP-0333](http://xmpp.org/extensions/xep-0333.html) | A solution of marking the last received, displayed and acknowledged message in a chat. |
| [Internet of Things - Discovery](iot.md) | [XEP-0347](http://xmpp.org/extensions/xep-0347.html) | Describes how Things can be installed and discovered by their owners. |
| [Push Notifications](pushnotifications.md) | [XEP-0357](http://xmpp.org/extensions/xep-0357.html) | Defines a way to manage push notifications from an XMPP Server. |
| Stable and Unique Stanza IDs | [XEP-0359](http://xmpp.org/extensions/xep-0359.html) | This specification describes unique and stable IDs for messages. |
| HTTP File Upload | [XEP-0363](http://xmpp.org/extensions/xep-0363.html) | Protocol to request permissions to upload a file to an HTTP server and get a shareable URL. |
| [Spoiler Messages](spoiler.md) | [XEP-0382](http://xmpp.org/extensions/xep-0382.html) | Indicate that the body of a message should be treated as a spoiler |
| [Multi-User Chat Light](muclight.md) | [XEP-xxxx](http://mongooseim.readthedocs.io/en/latest/open-extensions/xeps/xep-muc-light.html) | Multi-User Chats for mobile XMPP applications and specific enviroment. |
| [OMEMO Multi End Message and Object Encryption](omemo.md) | [XEP-XXXX](https://conversations.im/omemo/xep-omemo.html) | Encrypt messages using OMEMO encryption (currently only with smack-omemo-signal -> GPLv3). |
| [Consistent Color Generation](consistent_colors.md) | [XEP-0392](http://xmpp.org/extensions/xep-0392.html) | Generate consistent colors for identifiers like usernames to provide a consistent user experience. |
| [Message Markup](messagemarkup.md) | [XEP-0394](http://xmpp.org/extensions/xep-0394.html)| Style message bodies while keeping body and markup information separated. |