Callisto is about improving the productivity of the developers working on top of Eclipse frameworks by providing a more transparent and predictable development cycle. By releasing 10 projects at the same time, the goal is to eliminate uncertainty about version compatibility and make it easier to incorporate multiple projects into your environment.
While Callisto is about the simultaneous release of ten projects, it is not a unification of the projects - each project remains a separate open source project operating with its own project leadership, its own committers, and its own project plan.
Below is a listing of all ten projects involved in the Callisto Simuntaneous Release:
The Callisto Experience starts with a small download in the form of the Eclipse Platform Runtime Binaries. From this starting point, using the Callisto Discovery Site, you can add as few or as many of the features produced by the ten projects involved in the Callisto release train as you need.