FOSS apps: free and open source

Free and open-source software: the source code is public under an open licence.

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Tridenta

Trentino public transport: trips, lines and stops
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
TRIfA

TRIfA Tox Client
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Trigger

Open doors via Wi-Fi using HTTPS/SSH.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Trime

Chinese IME with Rime Input Method Engine
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
TriPeaks

A tri peaks solitaire game.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
TriPeaks NEUE

A simple Tri Peaks game.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Triple Match

A minimal, open-source 3D tile-matching puzzle game.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
T
TripleCamel

Check price history of Amazon products
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Trireme for Deluge

Deluge thin client
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Trivia App

A simple app that pulls out trivia out of OpenTriviaDB and challenges you.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Trollslate

Trolling app to prank your friends with barcode looking messages
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Truvark

A multi-vault file encryption app that respects your privacy.
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
T
Try LBRY

Let's see if your favourite YouTube content is available on LBRY
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Tryst

Private, offline, encrypted tracker for your intimate life.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Träwelldroid

Free check-in service for recording journeys in public transport
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid Zapstore
Tsacdop - Podcast Player

Enjoy podcasts with Tsacdop! An open source podcast player built with flutter.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Tsacdop-Fork - Podcast Player

Enjoy podcasts with Tsacdop-Fork! A clean, simply beautiful, and friendly app.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
TSViewer

Simple TS client which shows you the amount and names of connected clients.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
TSVNC

Small and simple VNC client.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
TTime

Android app to calculate transfer time, data quantity and bandwidth
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
TTL Changer

An app to change default TTL value
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
TTL Editor

Change TTL of networking packets
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
tTorrent search

Simple interface for Transdroid search
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
TTRSS-Reader

An RSS reader for Tiny Tiny RSS
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
TTS Util

Text-to-Speech Utility Application
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
TU Darmstadt Moodle Wrapper

Open Moodle links of the TU Darmstadt in the official Moodle app
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
TU Expense Tracker

Private, offline-first expense tracking directly from bank SMS alerts.
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Tubester

Scan Hitster cards and play their songs on YouTube
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Tulsi Gallery

A sweet looking photos gallery app for android!
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Tumblr Downloader

Download images and videos from Tumblr posts
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Tune Tangler

Enjoy your music — record, refine, remix, share.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
TuneFriend

Stream music from your friend's Subsonic server
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Tuner

A simple and precise tuner
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Tuner

App for tuning musical instruments.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Tuner

Musical instrument pitch tuning
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Tunerly

A minimalistic pitch tuning app for Guitar, Bass and Ukulele.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Tuning fork

Reference tones source for musical instruments tuning
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
TunnelForge

L2TP/IPsec VPN client for modern Android
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Turkish for AnySoftKeyboard

AnySoftKeyboard Turkish Language pack
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Turn the Page

Read FB2, EPUB and PDF with paper page turns and a spread on foldables
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Turns of War

A pixelart styled turn based strategy game
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Turtl

Request missing icons in your icon pack
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Turtle

A Platform with Pythonic language to practice CPU/GPU programming on mobile
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
Tusky

A multi account client for the social network Mastodon
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Tutto Counter

A simple score counter for the dice game "Tutto".
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Tuty Fruty Slot for Android

This is a playing for fun slot machine game (no gambling). It has five reels, th
- Games
- FOSS
- Free
- No tracking
- Android only
F-Droid Zapstore
Tux Math
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid
Tux Paint

A drawing program for children.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore