The Missing Package Manager for macOS (or Linux) — Homebrew - the brew utility is almost vital for macOS!
Tunnelblick | Free open source OpenVPN VPN client server software for macOS - a very good VPN solution for macOS
duck | Cyberduck CLI - a universal file transfer tool
iPackr on the Mac App Store - is an archive app I have been using, handles Zip files and allows easy, specific extracts
iTerm2 - macOS Terminal Replacement - a lot of people use this, although I have never done so
Warp: Your terminal, reimagined - they are planning Windows and Linux versions, but this is a fresh terminal