The url you posted leads to a generator for a maven / gradle project. It essentially gives you a hello world quarkus project, including Dockerfiles, mavens pom.

The url you posted leads to a generator for a maven / gradle project. It essentially gives you a hello world quarkus project, including Dockerfiles, mavens pom.xml, etc. You can quickly select often used dependencies / libraries you want to have included. They are put in the maven / gradle dependency lists of the project you are creating. That makes it faster to start a new application. Are you confused by the wording extension here? They use it synonymously with dependency / library, in this case, maven/gradle dependencies. They are probably extensions in the sense that those dependencies / libraries are useless without quarkus. Spring provides the same: https://start.spring.io/ https://start.spring.io/