Libretube for YouTube: https://f-droid.org/en/packages/com.github.libretube/

Organic Maps for navigation and stuff: https://f-droid.org/en/packages/app.organicmaps/ It even shows speed cameras, which Google doesn't!

Seal for downloading videos: https://f-droid.org/en/packages/com.junkfood.seal/

• Aegis: 2FA authenticator.
• AntennaPod: podcasts.
• Aurora Droid - Alternative for F-Droid store.
• Aurora Store - Alternative for Google Play.
• Blokada 5 - Blocks trackers and ADS, and lets you set DNS (I'm using cloudflare)
• CloudSteam - Steaming shows and movies.
• Element - Federated instant chat app with voice and video support. End-to-end encryption EVERYWHERE.
• FindMyDevice - finds my device lol
• Hypatia - Malware scanner (with realtime scan support).
• Librera PRO - Book and PDF reader.
• link eye - let you copy the link you shared with link eye.
• Mull - Firefox based browser.
• Nekogram X - Telegram fork
• Newpipe x sponserblock - plays youtube videos (on backgroud too) with sponsorblock support.
• Organic Maps - OSM based map app.
• ProtonVPN - VPN that respect your privacy and saves no logs.
• RustDesk - TeamViewer Alternative.
• Tutanota - Email service that lets you send E2EE emails.

• Aegis Authenticator, IMO the best TOTP app out there.
• mpv-android to play almost any kind of multimedia files.
• Organic Maps for an OpenStreetMaps-based navigation, and doesn't require an Internet connection to operate.
• StreetComplete to fill missing OpenStreetMaps info you encounter, in an almost fun manner.
• Syncthing-Fork for a Syncthing client with some good mobile-specific tweaks.
• Termux to emulate and run a bunch of console-based softwares (like youtube-dl, etc).
• AirGuard to detect if you're being tracked by an Apple AirTag without your knowledge.

• Mull: web browser
• QKSMS: text messaging with import/export support.
• K-9 Mail
• andOTP
• Vanilla Music
• DroidShows: because I sometimes forget where I left off when watching a show
• OsmAnd~: it's so-so for road navigation, but absolutely fantastic for hiking
• and finally lemmur, naturally

• Pdf Viewer Plus - simple PDF viewer
• quickDic - offline dictionary
• App Manager - full-featured package manager and viewer
• Librera PRO - All-Format eBook Reader
• K-9 Mail - Full-featured email client
• obsqr - fastest and most lightweight qr code reader
• Kernel Adiutor - Manage kernel parameters
• Metro - Best material design music player

Just recently found Barista. Its an alternative instagram client that lets you browse privately and does not expose you to their stupid algorithm. Also Infinity to go on Reddit.