OK Google - Explore over 150 Google Now voice commands in one place
Smaller - Make your websites load faster
Paletro - Enable command palette (⇧⌘P) in any application on macOS
Website Grader - Grade your website's strengths and weaknesses in seconds.
Osara - Osara brings Command Palette for app menus to all your apps
Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.