Alfred 3
Ultimate spotlight. Understatement. https://www.alfredapp.com/blog/announcements/alfred-3-is-here/
Bettertouch Tool
Shortcuts with your trackpad https://www.boastr.net/bettertouchtool-store-live/
Cheatsheet
List all shortcuts associated with the current app https://cheatsheetapp.com/CheatSheet/?lang=en
Contexts
Focus windows, by searching their titles/using hotkeys! http://contexts.co
Dupe
are you sure you want to pay for Gemini? Super fast and efficient duplicate file cleaner https://www.hardcoded.net/dupeguru/
Ghostnotes
Contextual Notes for any app http://www.ghostnotes.net/
KeyboardBinding.dict
Keyboard Maestro
Automation must-have - never manually repeat a task again! https://www.macstories.net/tag/keyboard-maestro/
Markoff
A free markdown previewer, if you can't afford Marked 2 https://robots.thoughtbot.com/markoff-free-markdown-previewer
Omnidisksweeper
Forget daisy disk. This free alternative analyses your disk space fast. and free. http://www.dodownload.com/os-utils/file-disk/omnidisksweeper.html
Onyx
The must-have system utilities and cleaner - free too!. http://www.titanium.free.fr/onyx.html
Postbox
Better than Airmail, IMHO! https://software.com/mac/utilities/pstconverterpro/310
pCloud
Secure alternative to Dropbox https://www.lifesize.com/en/support/software-download
Postman
Work efficiently with APIs https://www.getpostman.com/docs/install_native
Rambox
The all-in-one messenger for any service i.e. facebook, skype, whatsapp http://appsformacpc.com/rambox/
Sequel
mysql through GUI! https://www.bluem.net/en/mac/gatekeeper/