The IoT working group within the Eclipse Foundation is a joint effort to develop generic building blocks for creating IoT solutions. As of now, they host over 30 projects, which address different aspects of the realization of IoT use cases. The vast number of projects allow the design of tailored IoT solutions but bear the risk that people get lost in the wide range of projects. The recently introduced project Eclipse IoT packages will help here. It aims to provide pre-bundled software packages for the IoT. In this talk, we are going to introduce the work of the Eclipse IoT working group and showcase selected projects with the focus on how one can use those technologies to build custom domain specific IoT solutions. Specifically, we will focus on the message hub Eclipse Hono,, the digital twin solution Eclipse Ditto, the update manager Eclipse hawkBit and Eclipse Vorto a description language for IoT devices. We further plan to show how one can combine and use the projects in a sensible way within the Eclipse IoT packages project.