https://f-droid.org/forums/topic/emu-ex-plus-alpha-multi%E2%80%90platform-emulator/
https://f-droid.org/forums/topic/collection-of-classic-video-game-emulators/
Duplicate

https://f-droid.org/forums/topic/aard2-offline-wiki-and-dictionary-reader/
https://f-droid.org/forums/topic/aard2/
Looks like Duplicate (the same source)

https://f-droid.org/forums/topic/openexplorer-2/
We got Open Explorer Beta (0.212)

https://f-droid.org/forums/topic/wallsplash-android/
https://f-droid.org/forums/topic/wallsplash/
Duplicate

https://f-droid.org/forums/topic/webapps-sandboxed-browser/
We got this (1.4), the newest version is 2.2

https://f-droid.org/forums/topic/orfox/
We got this [Guardianproject?] (Fennec-38.1.0esr/TorBrowser-5.0/Orfox-1.0beta1)

https://f-droid.org/forums/topic/popcorn-time/
https://f-droid.org/forums/topic/popcorn-time-for-android/
Duplicate

https://f-droid.org/forums/topic/kodi-xbmc/
https://f-droid.org/forums/topic/xbmc/
Duplicate (delete 2nd link)

https://f-droid.org/forums/topic/piwik-mobile-2-2/
https://f-droid.org/forums/topic/piwik/
Duplicate (delete 2nd link)

https://f-droid.org/forums/topic/jitsi/
https://f-droid.org/forums/topic/jitsi-xmpp-client/
Duplicate