####
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###A
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###B
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###C
| App Name | Describe | Major Language | Download |
|---|---|---|---|
| ChatSecureAndroid | the most private messaging for Android and iOS https://dev.guardianproject.info/projects/chatsecure/issues | Java |  |
###D
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###E
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###F
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###G
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###H
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###I
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###J
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###K
| App Name | Describe | Major Language | Download |
|---|---|---|---|
| K-9 Mail | K-9 Mail – Advanced Email for Android | Java | |
| KissProxy | NIO based android http&https local proxy. | Java | |
| Kontalk Messenger | Kontalk official Android client http://www.kontalk.org | Java | |
###L
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###M
| App Name | Describe | Major Language | Download |
|---|---|---|---|
| MaterialQQLite | A material style of QQ (base on https://github.com/zym2014/MingQQ) | Java | |
| messaging | Odoo Mobile Messaging Client. | Java | |
| MingQQ | 使用WebQQ协议开发的山寨QQ客户端，目前实现了Windows版和Android版 | Java |  |
| mogujie TeamTalk | The android client of mogutt http://tt.mogu.io/ | Java | |
###N
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###O
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###P
| App Name | Describe | Major Language | Download |
|---|---|---|---|
| ProxyDroid | Global Proxy for Android | C | |
###Q
| App Name | Describe | Major Language | Download |
|---|---|---|---|
| qksms | QKSMS is an open source replacement to the stock messaging app on Android | java | |
###R
| App Name | Describe | Major Language | Download |
|---|---|---|---|
| Rocket.Chat | Have your own Slack like online chat, built with Meteor. https://rocket.chat/ | CoffeeScript | |
###S
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###T
| App Name | Describe | Major Language | Download |
|---|---|---|---|
| Tutanota | Tutanota is the end-to-end encrypted mail client that enables you to communicate securely with anyone. | JavaScript | |
| Telegram Messenger | Telegram Messenger for Android https://telegram.org/ | Java | |
| TextSecure | A secure calling app for Android. | Java | |
| TintBrowser | Is an open-source browser for Android 4 and above | Java | |
###U
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###V
| App Name | Describe | Major Language | Download |
|---|---|---|---|
| VideoFly | VideoFly is a video calling application which enables you to stay in a video call while using other applications. | Java | |
###W
| App Name | Describe | Major Language | Download |
|---|---|---|---|
| 高仿微信 | |
||
| WiFi Walkie Talkie | Simple application transmitting audio from mic to all devices running the same program on the same network segment. Use NSD for device discovery. | Java | |
###X
| App Name | Describe | Major Language | Download |
|---|---|---|---|
###Y
| App Name | Describe | Major Language | Download |
|---|---|---|---|
| Yaaic | Yaaic (Yet Another Android IRC Client) is as the name already says an Internet Relay Chat (IRC) client for Android devices. http://www.yaaic.org | Java | |
###Z
| App Name | Describe | Major Language | Download |
|---|---|---|---|
| Zulip Android | Zulip Android app, Powerful open source group chat https://www.zulip.org/ | Java | |