aTalk - xmpp client for android rich in features:
* Instant messaging using end-to-end encryption with OMEMO or OTR
* User authentication based on SSL Certificate DNSSEC and DANE Security
* OMEMO encryption for multi-user-chat sessions and offline users
* OMEMO Media File Sharing on all file types including Stickers Bitmoji and Emoji
* HTTP file upload supports file sharing with offline contacts and muc members
* Rich content sharing via Google Gboard for downloadable Stickers Bitmoji and Emoji
* Media file sharing with thumbnail preview before actual file send
* Auto accept file transfer request with max file size option
* Fault-tolerance file transfer implementation ease and enhance file sharing reliability
* Enhance and harmonize UI for file sharing in chat and chatRoom
* Jabber VoIP-PBX gateway Telephony allowing PBX phone call via service gateway
* MUC room creation server chat rooms discovery and chat room with captcha protection
* Bookmark for conference and autoJoin on login
* XEP-0012: Last Activity to show the time of the last activity associated with a contact
* Support XEP-0070: Verify HTTP Requests via XMPP entity to confirm it made the request
* XEP-0184: Message Delivery Receipts with user enable/disable option
* Voice and video call with ZRTP SDES and DTLS SRTP encryption modes
* Unique GPS location as standalone tool or sending locations to your chosen buddy for real-time tracking or playback animation.
* 360° street view of your current location use for self-guided tour. The street view tracks and follows your direction of sight.
* Built-in demo for GPS-Location features
* Integrated photo editor with zooming and cropping; change avatar with ease
* Last message correction message carbons and offline messages
* Mobile network ping interval auto optimization
* In-Band Registration with captcha option
* Multiple accounts creation
* Multi-language UI support (Bahasa Indonesia English German Russian and Spanish)