AntennaPod
Ad-free, open-source Android podcast player with OPML import and auto-downloads
Unknown developer
31 apps on TopDown APK antennapod.org
The developer appears in this catalog as Unknown developer, with antennapod.org as the website. The catalog holds 31 entries, and all of them are listed for Android. The eight titles shown here are split between five apps and three games, with two offline strategy games and one pixel-art game.
Licenses vary across the list. AntennaPod and Ultrasonic use GPL-3.0-only, K-9 Mail uses Apache-2.0, and Syncthing-Fork uses MPL-2.0. The most recent updates are for Syncthing-Fork and The Battle for Wesnoth, both dated October 25, 2026, while Ultrasonic was last updated March 11, 2026.
Apps by Unknown developer
K-9 Mail
Free, ad-free open-source email app with a Unified Inbox and PGP/MIME
Mindustry
Factory-building tower defense with two campaigns, a map editor and co-op play
ownCloud
Open-source Android client for syncing files with your own server
Shattered Pixel Dungeon
Free, ad-free roguelike with 6 heroes, 26 floors and open-source code
Syncthing-Fork
Free, ad-free Syncthing wrapper with per-folder sync rules for Android 6.0+
The Battle for Wesnoth
Free, ad-free fantasy strategy with online and hotseat multiplayer
Ultrasonic
Free, ad-free Subsonic music client for Android in a 5.4 MB package
KDE Connect
Free, ad-free Android app that links your phone to a PC over local WiFi
Clementine Remote
Free open-source Android remote for the Clementine music player
Clock
Free offline alarm clock with math dismissal, no ads, 6.9 MB, Android 6.0+
CoMaps
Ad-free offline maps on OpenStreetMap data with hiking and transit layers
Dart Checker
Free, offline Android scoreboard for real darts, from X01 to Cricket
Forkyz
Open-source, ad-free crossword app that imports .puz, JPZ and IPuz files
Ladefuchs
Free German app that shows the cheapest EV charging card in one swipe
LeanType
Free open-source Android keyboard with floating mode and offline voice
Litube
Ad-free open-source video client with downloads and sponsor skipping
SimpleX Chat
Free, open-source Android messenger that uses no user IDs at all
SkyTube
Ad-free, open-source YouTube client with downloads and channel blocking
SkyTube Legacy
Ad-free, open-source YouTube client for older Android phones, 8.6 MB
Suntimes
Open-source sun and moon clock with sunrise alarms, no ads, 11.2 MB
SuperX Video Downloader
Open-source Android downloader with HLS, DASH, proxies and no ads
VRChat Android Assistant
Free, ad-free Android app for managing VRChat friends without the game client
WebInspector
Free open-source Android app for inspecting DOM, console and network.
YAACC
Free, ad-free open-source UPnP/DLNA client, server and controller
Yagni Launcher
Open-source, ad-free stock-style launcher in a 2.8 MB alpha build
YtReader
Free, ad-free Android app that turns YouTube subtitles into readable text
Fennec F-Droid
Open-source Firefox build for Android with telemetry removed and no ads
Briar
Free open-source Android messenger that syncs via Tor, Bluetooth or Wi-Fi
Luanti
Free, ad-free voxel game platform with Lua mods and multiplayer
OpenVPN for Android
Free, ad-free OpenVPN client for Android 6.0+ that needs no root access