Cross-platform open-source fast and free alternative to Alfred and Spotlight
Another cross-platform extendable open-source launcher. It is built with js, Electron and React. Cerebro is focused on extendability, speed, good UI and UX.
In most cases, you don't need to launch another application – you can see everything in Cerebro, i.e. google maps, films on IMDB, results of shell scripts or gifs