This is a list of known apps in F-Droid repos which are F/LOSS and are developed on F/LOSS version control systems.
The purpose is to recognize F-Droid apps and developers who are shining examples by using F/LOSS systems for developing their apps.
This is (or will be) a wiki topic, so you can edit this list if your forum account has Basic or “higher” status. Please keep it alphanumerically ordered, and look at existing examples for format. Improvements and additions are welcome.
Criteria for “F/LOSS” development systems shall be guided by wikipedia summary, Comparison of source-code-hosting facilities - Wikipedia for “notable” sites, and development site software and Terms for all. What the developer uses for their personal systems and editing is beyond the scope here. Edit/Note: Due to confusion over gitlab dot com licenses and a variety of other negative factors, apps on main gitlab dot com will also be excluded from this list.
Contents of F-Droid index and source and issues links shall determine, in cases of mirrors.
It is hoped this list can be automated using @frief 's app_match.R - find similar apps on f-droid by similarity of their descriptions - #5 by frief
or what @k3b is implementing Statistics: Apps with summary/description by language at f-droid.org
combined with a list of F/LOSS development systems.
Credit: Intro is modified from @NicoAlt Known Repositories
aagtl
Note: Last update 2015
https://f-droid.org/en/packages/com.zoffcc.applications.aagtl/
Source: Dead link in metadata
Issues: ?
Adblock Plus
Note: DEPRECATED, Last F-Droid update 2013
https://f-droid.org/en/packages/org.adblockplus.android/
Source: https://hg.adblockplus.org/adblockplusandroid
Issues: https://adblockplus.org/forum/viewforum.php?f=11
Automation:
https://f-droid.org/en/packages/com.jens.automation2/
Source: https://git.server47.de/jens/Automation
Issues: ?
A Whip
https://f-droid.org/en/packages/at.h4x.awhip/
Source: https://codeberg.org/uniqx/AWhip
Issues: https://codeberg.org/uniqx/AWhip/issues
blabber.im
https://f-droid.org/en/packages/de.pixart.messenger/
Source: https://codeberg.org/kriztan/blabber.im
Issues: https://codeberg.org/kriztan/blabber.im/issues
Cheogram
Note: Uses microsoft github for donations. 
https://f-droid.org/en/packages/com.cheogram.android/
Source: https://git.singpolyma.net/cheogram-android
Issues: https://soprani.ca/todo
Diary
Note: This is one of very few Android apps on Savannah. This app has not been updated since 2013. Sadly, the updated, forked version is developed on proprietary Github.
https://f-droid.org/en/packages/jpf.android.diary/
Source: https://git.savannah.gnu.org/cgit/diary.git
Issues: ?
Disroot app
https://f-droid.org/en/packages/org.disroot.disrootapp/
Source: https://git.disroot.org/Disroot/disapp
Issues: https://git.disroot.org/Disroot/disapp/issues
DroidFS
https://f-droid.org/en/packages/sushi.hardcore.droidfs/
Source: https://forge.chapril.org/hardcoresushi/DroidFS
Issues: https://forge.chapril.org/hardcoresushi/DroidFS/issues
Easy Open Link
https://f-droid.org/en/packages/de.audioattack.openlink/
Source: https://codeberg.org/marc.nause/easyopenlink
Issues: https://codeberg.org/marc.nause/easyopenlink/issues
Export Contacts
https://f-droid.org/en/packages/am.ed.exportcontacts
Source: http://bzr.ed.am/android/export-contacts
Issues: http://dev.ed.am/export-contacts
F-Droid Classic
https://f-droid.org/en/packages/eu.bubu1.fdroidclassic
Note: If you are going to use an F-Droid app, you ought to use a version developed on FOSS.
Source: https://git.bubu1.eu/Bubu/fdroidclassic
Issues: https://git.bubu1.eu/Bubu/fdroidclassic/issues
F-Droid Forum
https://f-droid.org/en/packages/at.h4x.fdroidforumclient
Source: https://codeberg.org/uniqx/fdroid-forum-client
Issues: https://codeberg.org/uniqx/fdroid-forum-client/issues
Fedilab
https://f-droid.org/en/packages/fr.gouv.etalab.mastodon
Source: https://framagit.org/tom79/fedilab
Issues: https://framagit.org/tom79/fedilab/issues
Fedilab Lite
https://f-droid.org/en/packages/app.fedilab.lite
Source: https://framagit.org/tom79/fedilab
Issues: https://framagit.org/tom79/fedilab/issues
FediPhoto-Lineage
https://f-droid.org/en/packages/com.fediphoto.lineage/
Source: https://codeberg.org/silkevicious/fediphoto-lineage.git
Issues: https://codeberg.org/silkevicious/fediphoto-lineage/issues
FeinstaubWidget
https://f-droid.org/en/packages/de.kaffeemitkoffein.feinstaubwidget/
Source: https://codeberg.org/Starfish/Feinstaubwidget
Issues: https://codeberg.org/Starfish/Feinstaubwidget/issues
GadgetBridge:
https://f-droid.org/en/packages/nodomain.freeyourgadget.gadgetbridge/
Source: https://codeberg.org/Freeyourgadget/Gadgetbridge
Issues: https://codeberg.org/Freeyourgadget/Gadgetbridge/issues
GitNex for Gitea
https://f-droid.org/en/packages/org.mian.gitnex/
Source: https://codeberg.org/gitnex/GitNex/src/branch/master
Issues: https://codeberg.org/gitnex/GitNex/issues
GymRoutines
https://f-droid.org/en/packages/com.noahjutz.gymroutines/
Source: https://codeberg.org/noahjutz/GymRoutines
Issues: https://codeberg.org/noahjutz/GymRoutines/issues
Imagepipe
https://f-droid.org/en/packages/de.kaffeemitkoffein.imagepipe/
Source: https://codeberg.org/Starfish/Imagepipe
Issues: https://codeberg.org/Starfish/Imagepipe/issues
LASKmobile
https://f-droid.org/en/packages/com.rfo.LASKmobile/
Source: https://codeberg.org/ibinshoid/LASKmobile
Issues: https://codeberg.org/ibinshoid/LASKmobile/issues
LibreOffice Viewer
https://f-droid.org/en/packages/org.documentfoundation.libreoffice/
Source: https://cgit.freedesktop.org/libreoffice/core/tree
Issues: https://bugs.documentfoundation.org/
MagiaDNI
Note: This is one of very few Android apps on Savannah. This app has not been updated since 2017.
https://f-droid.org/en/packages/jpf.android.magiadni/
Source: https://git.savannah.gnu.org/cgit/magiadni.git
Issues: ?
monocles browser
https://f-droid.org/en/packages/de.monocles.browser/
Source: https://codeberg.org/Arne/monocles_browser
Issues: https://codeberg.org/Arne/monocles_browser/issues
monocles chat
https://f-droid.org/en/packages/de.monocles.chat/
Source: https://codeberg.org/Arne/monocles_chat
Issues: https://codeberg.org/Arne/monocles_chat/issues
monocles mail
https://f-droid.org/en/packages/de.monocles.mail/
Source: https://codeberg.org/Arne/monocles_mail
Issues: https://codeberg.org/Arne/monocles_mail/issues
monocles social
https://f-droid.org/en/packages/de.monocles.social/
Source: https://codeberg.org/Arne/monocles_social
Issues: https://codeberg.org/Arne/monocles_social/issues
monocles translator
https://f-droid.org/en/packages/de.monocles.translator/
Source: https://codeberg.org/Arne/monocles_translator
Issues: https://codeberg.org/Arne/monocles_translator/issues
MuPDF mini
https://f-droid.org/en/packages/com.artifex.mupdf.mini.app/
Source: https://git.ghostscript.com/?p=mupdf-android-viewer-mini.git;a=summary
Issues: https://bugs.ghostscript.com/
MuPDF viewer
https://f-droid.org/en/packages/com.artifex.mupdf.viewer.app/
Source: https://git.ghostscript.com/?p=mupdf-android-viewer.git;a=summary
Issues: https://bugs.ghostscript.com/
Open Camera
https://f-droid.org/en/packages/net.sourceforge.opencamera/
Source: https://sourceforge.net/p/opencamera/code
Issues: https://sourceforge.net/p/opencamera/tickets
PartyGames
https://f-droid.org/en/packages/de.rmrf.partygames/
Source: https://codeberg.org/rm-rf/PartyGames
Issues: https://codeberg.org/rm-rf/PartyGames/issues
Privacy Browser
https://f-droid.org/en/packages/com.stoutner.privacybrowser.standard/
Source: https://gitweb.stoutner.com/?p=PrivacyBrowserAndroid.git;a=summary
Issues: https://redmine.stoutner.com/projects/privacy-browser/issues
Privacy Cell
https://f-droid.org/en/packages/com.stoutner.privacycell/
Source: https://gitweb.stoutner.com/?p=PrivacyCell.git;a=summary
Issues: https://redmine.stoutner.com/projects/privacy-cell/issues
SelfPrivacy
https://f-droid.org/en/packages/pro.kherel.selfprivacy/
Source: https://git.selfprivacy.org/kherel/selfprivacy.org.app
Issues: https://git.selfprivacy.org/kherel/selfprivacy.org.app/issues
Silence
https://f-droid.org/en/packages/org.smssecure.smssecure/
Source: https://git.silence.dev/Silence/Silence-Android/
Issues: https://git.silence.dev/Silence/Silence-Android/issues
Sudaku - Make your rules to solve sudoku
https://f-droid.org/en/packages/com.gitea.theoden8.sudaku/
Source: https://gitea.com/theoden8/sudaku
Issues: https://gitea.com/theoden8/sudaku/issues
Taler Cashier
https://f-droid.org/en/packages/net.taler.cashier/
Source: https://git.taler.net/taler-android.git/
Issues: https://bugs.gnunet.org/
GNU Taler Point-of-Sale
Note: Ignoring “GNU” in title to keep grouped with other Taler apps
https://f-droid.org/en/packages/net.taler.merchantpos/
Source: https://git.taler.net/taler-android.git/
Issues: https://bugs.gnunet.org/
Taler Wallet
https://f-droid.org/en/packages/net.taler.wallet.fdroid/
Source: https://git.taler.net/taler-android.git/
Issues: https://bugs.gnunet.org/
Tomdroid
https://f-droid.org/en/packages/org.tomdroid/
Source: https://launchpad.net/tomdroid/stable
Issues: https://bugs.launchpad.net/tomdroid
UntrackMe
https://f-droid.org/en/packages/app.fedilab.nitterizeme/
Source: https://framagit.org/tom79/nitterizeme
Issues: https://framagit.org/tom79/nitterizeme/issues
UntrackMe Lite
https://f-droid.org/en/packages/app.fedilab.nitterizemelite/
Source: https://framagit.org/tom79/nitterizeme
Issues: https://framagit.org/tom79/nitterizeme/issues
Vertretungsplan.io - free substitution plan App
https://f-droid.org/en/packages/io.vertretungsplan.client.android/
Source: https://codeberg.org/vertretungsplan/client-android
Issues: https://codeberg.org/vertretungsplan/client-android/issues
VLC
https://f-droid.org/en/packages/org.videolan.vlc/
Source: https://code.videolan.org/videolan/vlc-android
Issues: https://code.videolan.org/videolan/vlc-android/-/issues
Weather
https://f-droid.org/en/packages/de.beowulf.wetter/
Source: https://codeberg.org/Beowulf/Weather
Issues: https://codeberg.org/Beowulf/Weather/issues
Wireguard
https://f-droid.org/en/packages/com.wireguard.android/
Source: https://git.zx2c4.com/wireguard-android/
Issues: https://lists.zx2c4.com/mailman/listinfo/wireguard
WTF‽ (The MirOS Project)
Note: Last updated 2017
https://f-droid.org/en/packages/de.naturalnet.mirwtfapp/
Source: https://edugit.org/nik/MirWTFApp.git
Issues: https://edugit.org/nik/MirWTFApp
Xearth
https://f-droid.org/en/packages/de.drhoffmannsoftware.xearth/
Source: https://codeberg.org/kollo/xearth
Issues: https://codeberg.org/kollo/xearth/issues
Xenia
https://f-droid.org/en/packages/space.rocketnine.xenia/
Source: https://code.rocketnine.space/tslocum/xenia
Issues: https://code.rocketnine.space/tslocum/xenia/issues
Xmp Mod Player
https://f-droid.org/en/packages/org.helllabs.android.xmp/
Source: https://sourceforge.net/p/xmp/xmp-android
Issues: ?
Yabause
Note: Not updated since 2013.
https://f-droid.org/en/packages/org.yabause.android/
Source: https://sourceforge.net/p/yabause/code
Issues: https://sourceforge.net/projects/yabause/support
YARC
https://f-droid.org/en/packages/com.jstephan.yarc/
Source: https://framagit.org/stephjul/yarc
Issues: https://framagit.org/stephjul/yarc/issues
YubNub Command Line
Note: Not updated since 2013.
https://f-droid.org/en/packages/de.antonfluegge.android.yubnubwidgetadfree/
Source: https://sourceforge.net/p/yubnubapp/code
Issues: https://sourceforge.net/p/yubnubapp/tickets
