Internet

Vernet

Host and Port scanner. Ping IP or domain.

aTalk

XMPP/Jabber client with encrypted instant messaging and video calls

Session F-Droid

Encrypted private messenger

Matsuri

Proxy toolchain for Android

Nextcloud Notes

View and edit notes on Nextcloud

Nextcloud Deck

Companion app for Nextcloud Deck

FairEmail

Fully featured email client. Neat, intuitive user interface. Privacy friendly

FOSS Warn

Get emergency alerts from warnung.bund.de

Url checker

Allows you to analyze (or share) urls before opening them.

Nextcloud Talk

Have private video calls and chat using your own server.

Nextcloud

Synchronization client

kSync

Automatically sync your contacts and calendars

Xtra

a Twitch player and browser

DankChat

A simple app to chat on Twitch.tv

NewPipe

Lightweight YouTube frontend

Forkgram

Forkgram is a fork of the official Telegram for Android application.

AirMessage

Use iMessage on your Android phone! (Mac computer required)

SimpleLogin | Anti-spam

Protect your email inbox with a secure and open source solution by SimpleLogin

TUIC Plugin - SagerNet

The universal proxy toolchain for Android

Mieru Plugin - SagerNet

The universal proxy toolchain for Android

Quicksy

Jabber/XMPP with Easy Entry and Easy Discovery

AnonAddy for Android

Anonymous Email Forwarding

SkyTube

Conversations

An encrypted, user friendly XMPP instant messaging client optimized for mobile

blabber.im

is an Open Source XMPP/Jabber Messenger for Android

monocles chat

is an Open Source XMPP/Jabber Messenger for Android

monocles browser

A web browser that respects your privacy.

OpenVPN for Android

OpenVPN without root

TRIfA

TRIfA Tox Client

Discuz Hub

Lightweight Discuz! Android app