Here is a short list.
Pc: Cachyos(Preformant linux distro based on arch),Cinnamon (fork of Gnome 3),Librewolf (web browser)
Android phone:F-Droid(Appstore),Clipious(YouTube client but network is nonfree),aurora store(replaced Google play store with this and network nonfree),Iceraven (Web browser,Can be hardened as much as mull.),
Cross platform: Localsend(Airdrop for any device),Vlc media player
Yeah that's it,here is my major apps I use

On my Android: Fossify Gallery & Calendar, Thunderbird Mail, Eternity for Lemmy, AntennaPod, OSS Document Scanner, FUTO Keyboard, Gallery, KDE Connect, Moshidon (client for Mastodon), Next Player, Obtainium, (I wanted to have Logseq but I prefer Obsidian so I left it out), Swift Notes (I'm trying to get into).

On my Windows laptop: OnlyOffice Suite, Betterbird (Thunderbird, but better), FluentCast Podcast Player, FluentWeather, GIMP, Inkscape, KDE Connect, (I wanted to have Logseq but I prefer Obsidian so I left it out), Screenbox (VLC but modern and sexy), QuickLook, ShareX, Tenacity (Audacity fork that apparently is less controversial or something).

Firefox, GCC, VS Code (sorry, but Microsoft actually made something decent there, and yes, I do feel dirty using it).

Mull, Mihon, Anytype, FlorisBoard, Librewolf

Android Custom ROM itself

-Adaway -App Manager -Audile -Audio Recorder -Aurora Store -BiglyBT -BitmaskVPN -Bitwarden -Calyx VPN -Capy Reader -Cromite -De-Bloater (i translated it to hungarian) -easyNotes -eduVPN -Eternity -F-droid -Android Files -Android Recorder -FlorisBoard -Android FM Radio -freeDictionary (Owl) (i also translated the menu to hungarian) -FTPClient -FUTO Keyboard -Gadgetbridge -Android Gallery -Android Game Space -HeliBoard -Human Benchmark -Breezy Weather -Image Tools -Invizible Pro -Jerboa -Lagrange -LavSeeker -Magisk -microG -Namida Music Player -Fossify Calendar -Fossify Contacts -Next Player -Obtainium -OCR -Odyssee -OnionShare -OpenCamera -OpenVideoEditor -Android Clock -Forkgram -Organic Maps -Orion Viewer -OSS Document Scanner -Pachli -QR Scanner -Racoon -Revenge Discord Client -Root verifier -SD Maid -Seal -Setter -Shitter -SlimSocial -Spotube -StrongSwanVPN -NumberHub Calculator (i also translated this to hungarian) -Fossify Phone -Termux -Thunder -TranslateYou -UPnP Explorer -Fossify Messages -Vernet -ViperFX Material UI -Voyager -Warden -WikiReader -Xtra

And this is only my phone...