microG is a reimplementation of Google Play Services/GApps.
MuPDF Viewer displays documents.
Simple Calendar
Transit shows bus and train routes.
UniPatcher applies modifications to games and apps.
yetCalc is an advanced calculator.
ZArchiver is a file manager and compressor.
Networking
K-9 Mail is the mobile equivalent of Claws Mail.
Kiwi Browser is a variant of Chromium.
LibreTorrent is a BitTorrent client.
OpenVPN reroutes your connection to discourage trackers on your LAN.
Tor Browser is basically Firefox with a pseudonymizing proxy built-in.
Entertainment
Borked3DS emulates the New Nintendo 3DS.
Dolphin emulates the GameCube and Wii. A DolphinBar might be required for the ideal results.
JL-Mod is for Java-based mobile games from the 2000s.
jzIntvImGui emulates the Intellivision.
Play'A upscales videos for VR.
PPSSPP emulates the PlayStation Portable.
RetroArch organizes emulators of the following machines: 32X, Atari 7800, CPS2, DS, Famicom/NES, Game Boy Advance, Game Boy Color, Game Gear, Lynx, Master System, Naomi, Neo Geo MVS, Neo Geo Pocket Color, NES, PC Engine Duo/Turbo Duo, PC-FX, PSone, Saturn, SG-1000, Super Game Boy 2, Super NES/Super Famicom, WonderMega, and WonderSwan Color.