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).