Rambox is a messaging and emailing app that combines common web applications into one. It gives you the possibility to add common services many times you need, all in one place. It's perfect for people who work with many services for business and private accounts.
 
Rambox supports integration with 90+ services like Flock, Gmail, Hangouts, Hootsuite, Hushmail, iCloud Mail, ICQ, LinkedIn Messaging, Outlook, Outlook 365, Pushbullet, Skype, Slack, SquirrelMail, Steam Chat, TweetDeck, WhatsApp, Yahoo! Mail, Yahoo! Messenger, Zimbra and more.

Rambox is a messaging and emailing app that combines common web applications into one. It gives you the possibility to add common services many times you need, all in one place. It's perfect for people who work with many services for business and private accounts.

Rambox - Messaging and Emailing app that combines common web applications into one

With the rise of government surveillance programs, Tox, a FOSS initiative, aims to be an easy to use, all-in-one communication platform that ensures full privacy and secure message delivery. Tox must use UDP simply because hole punching with TCP is not as reliable. However, Tox does use TCP relays as a fallback if it encounters a firewall that prevents UDP hole punching.
 
It helps to chat instantly across the globe with Tox's secure messages. It supports Encrypted voice calls, Screen sharing, File sharing, Video calls, Share with group or team. Tox has no central servers that can be raided, shut down, or forced to turn over data — the network is made up of its users.

With the rise of government surveillance programs, Tox, a FOSS initiative, aims to be an easy to use, all-in-one communication platform that ensures full privacy and secure message delivery. Tox must use UDP simply because hole punching with TCP is not as reliable. However, Tox does use TCP relays as a fallback if it encounters a firewall that prevents UDP hole punching.

Tox - The future of online communications.

ChatSecure is a instant messaging client for iOS and Android that integrates encrypted OTR ("Off the Record") messaging support from the libotr library and the XMPPFramework to handle Jabber/GTalk (XMPP).

ChatSecure - Encrypted chat client for iOS and Android

Gajim  is a fully-featured XMPP client. It is decentralized messaging platform, Connect to your contacts using a server of your choice. Share pictures, videos, and files with friends and groups. It is end-to-end encrypted, Chat securely using OMEMO, PGP, or OpenPGP. 

Gajim - A fully-featured XMPP client

Ring is a free and universal communication platform which preserves the users' privacy and freedoms. It is a simple tool to connect, communicate and share. It has support of teleconference, easily join calls to create conferences with multiple participants. It helps to send text messeges during calls or out of calls (as long as your peer is connected).

Ring - Universal communication platform which preserves the users privacy and freedoms

Conversations is the instant messaging client for the Android. It supports XMPP, Jabber client, Encryption. It supports to send and receive images as well as other kind of files, Pictures / Avatars for your Contacts, Syncs with desktop client, Share your location, Send voice messages, Multiple accounts / unified inbox and lot more.


Conversation - Instant Messaging for Android

Briar is a messaging app designed for activists, journalists, and anyone else who needs a safe, easy and robust way to communicate. Unlike traditional messaging tools such as email, Twitter or Telegram, Briar doesn't rely on a central server - messages are synchronized directly between the users' devices. If the Internet's down, Briar can sync via Bluetooth or Wi-Fi, keeping the information flowing in a crisis. If the Internet's up, Briar can sync via the Tor network, protecting users and their relationships from surveillance.

Briar - Secure messaging, anywhere

Molly is a hardened version of Signal for Android, the fast simple yet secure messaging app by Signal Foundation. Back in 2018, Signal allowed the user to set a passphrase to secure the local message database. But this option was removed with the introduction of file-based encryption on Android. Molly brings it back again with additional security features.
 
<ul>
<li>Data encryption at rest - Protect the database with <a href="https://github.com/mollyim/mollyim-android/wiki/Data-Encryption-At-Rest">passphrase encryption</a></li>
<li>Secure RAM wiper - Securely shred sensitive data from device memory</li>
<li>Automatic lock - Lock the app automatically under certain conditions</li>
<li>Block unknown contacts - Block messages and calls from unknown senders for security and anti-spam</li>
<li>Contact deletion - Allows you to delete contacts and stop sharing your profile</li>
<li>Disappearing call history - Clear call notifications together with expiring messages</li>
<li>Debug logs are optional - Android logging can be disabled</li>
<li>Custom backup scheduling - Choose between daily or weekly interval and the number of backups to retain</li>
<li>SOCKS proxy and Tor support - Tunnel app network traffic via proxy and Orbot</li>
</ul>

Molly is a hardened version of Signal for Android, the fast simple yet secure messaging app by Signal Foundation. Back in 2018, Signal allowed the user to set a passphrase to secure the local message database. But this option was removed with the introduction of file-based encryption on Android. Molly brings it back again with additional security features. 

Molly - A fork of Signal for Android with passphrase lock

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