baresip+

VoIP User Agent app for Android based on baresip SIP library

baresip

基于 baresip SIP 库的 Android VoIP 用户代理应用

TRIfA

TRIfA Tox 客户端

Jitsi Meet

即时视频会议，能够高效适应不同规模

Wire • Secure Messenger

Wire offers highly secure communication – anywhere and anytime.

Threema Libre

Secure and private messaging

Session F-Droid

加密私人信使

monocles chat

是适用于 Android 的安全 XMPP 聊天客户端

Jami

自由且私密地分享

aTalk

XMPP/Jabber client with encrypted instant messaging and video calls

Quicksy

轻松进入轻松发现的 Jabber/XMPP

Conversations

为您的移动设备提供加密、易用的 XMPP 即时通讯软件

SimpleX Chat

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

Cheogram

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

Olvid

Private messaging for everyone

Element X - Secure Chat & Call

Sovereign. Seamless. On Matrix

Mumla

在 Mumble 服务器上语音聊天

Element Classic

Previous generation Element

Nextcloud Talk

Have private video calls and chat using your own server.

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

another.im

Yet Another Conversations fork but...

aTox

aTox，一个美观现代的 Tox 客户端

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.

Lumicall

SIP 软件电话