baresip+

SIP and mobile calling and messaging User Agent for Android based on baresip lib

baresip

基于 baresip 库的适用于 Android 的 SIP 和移动通话及消息传递用户代理

TRIfA

TRIfA Tox 客户端

Jami

自由且私密地分享

Element X - Secure Chat & Call

Sovereign. Seamless. On Matrix

Wire • Secure Messenger

Wire offers highly secure communication – anywhere and anytime.

Threema Libre

Secure and private messaging

Quicall

Secure messaging with chat, voice and video calls.

aTalk

XMPP/Jabber client with encrypted instant messaging and video calls

SimpleX Chat

SimpleX Chat - e2e encrypted messenger without any user IDs - private by design!

Element Classic

Previous generation Element

Cheogram

Chat on the Jabber network (XMPP protocol); focus on features for gateway users

Session F-Droid

加密私人信使

Nextcloud Talk

Have private video calls and chat using your own server.

Olvid

面向所有人的私密消息

Conversations

为您的移动设备提供加密、易用的 XMPP 即时通讯软件

another.im

Yet Another Conversations fork but...

monocles chat

是功能齐全的 XMPP 聊天客户端

Ermis

Ermis M is an open-source, privacy focused mobile chat application.

Jitsi Meet

即时视频会议，能够高效适应不同规模

Mumla

在 Mumble 服务器上语音聊天

Snikket

Personal messaging app for groups, with a self-hostable open-source server

Linphone - open source SIP client

SIP（VoIP）电话

Meshenger

开源 P2P 通讯软件

ThreatScoopOnionChat

A Forked Version focused on privacy from SESSION

Sipdroid

SIP（VoIP）客户端

Databag

A federated chat client designed for privacy and selfhosting.

StoneAge

A self-hosted P2P messenger - you will need an S3 bucket to use it

unofficial Stud.IP-app

An unofficial app for Stud.IP systems.