After a few years I still use Listary as my main search/launcher. It's very quick, has a very nice look and great system of filters and projects. There are problem with new version to be released, but I'm talking about version number 5.
Google Assistant - Get things done with Google Assistant
Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Hound - Your code, always in style. Hound comments on style violations in GitHub pull requests, allowing you and your team to better review and maintain a clean codebase.
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.
Braina - Braina (Brain Artificial) is an intelligent personal assistant software for Windows OS that allows you to interact with your computer using voice commands.
Wox - An effective launcher for windows. A full-featured launcher, access programs and web contents as you type. Be more productive ever since. Wox is free for use and open-sourced at Github, Try it now! Download .