For terminal, the first thing I install is Midnight Commander - dual pane file manager. https://midnight-commander.org/
For all of my physical Linux machines - Cockpit and Cockpit-File Sharing plugin.
Desktop
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Thunderbird
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Firefox
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Vivaldi
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Gnome
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Chromium I use Firefox, wife uses Chromium and My WFH job I use Chrome. Vivaldi is a backup browser, I've been messing around with.
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QEMU/LibVirtd - So I can run a Windows VM for my old Canon Lide 60 scanner which scans clearly there, otherwise in Linux, it's contrasted super grey for some reason.
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Kopia-UI - Backup system which supports NFS Shares - set and forget type of setup.
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VLC - Need I say more? Lol
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OnlyOffice - Better aesthetically IMHO than LibreOffice
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PDF Arranger - Works well to re-arrange pages or rotate them after scanning them in. (I self host Sterling PDF and will probably switch to that later)
And for some inspiration - the "Awesome Linux Software" list (Not mine) similar to the other Awesome lists you see around. https://github.com/luong-komorebi/Awesome-Linux-Software