I'm not including very obvious stuff like Proton for Steam, Wine or a browser. This is very specific stuff I found myself really enjoying having on my Kubuntu.

✦⸻ tools

• frog: extract text from pics/screenshots
• blanket: ambient noise
• proton vpn: vpn
• switcheroo: convert img files
• video downloader: download any video from a url
• solaar: logitech peripherals manager
• maps: a map on your computer

✦⸻ media

• deluge: torrent client
• calibre: manage personal library (books & fics)
• cider: apple music client, paid
• freetube: watch yt free of ads and trackers
• tauon: music player

✦⸻ gaming

• play on linux 4: play games from windows on linux
• heroic games launcher: all your games in one launcher