All of the following applications are compatible with macOS Catalina:

• Abyss Web Server, simple to set up, brilliant for testing
• Amphetamine, to keep your Mac awake
• Bandwidth+, network usage tracker that sits in your menu bar
• Blackhole, to send files via blockchain
• Brave, my fave web browser, built on Chromium but with a lot of privacy - see also Tor
• Calibre, keep your ebook library tidy and converted
• Citationsy, absolutely the best bibliography tool out there, available both for web and macOS
• Clean, to keep your desktop nice by moving files from the desktop into organised folders
• DaisyDisk, disk-management app
• FocusWriter, word processor that blacks out everything but your writing
• Grammarly, keep your language (somewhat) in check
• Itsycal, brilliant little menu-bar calendar
• Kap, open-source screen recorder
• Karabiner, to customise your keyboard
• Magnet, to organise your windows
• Resilio Sync, to sync files with others and between your computers, all fully encrypted with no mid-level storage
• Submarine, to automatically add subtitles to your video
• The Unarchiver, to unpack any file format
• VirtualBox, to run operating systems virtually
• VLC, my fave video player. Runner-up: IINA
• VOX, music player