Enrique Zamudio (Chochos)

Simply the best build tool available. So much simpler and more powerful than Ant, Ivy, and especially Maven. It actually uses the best of these projects (dependency management for example).

For multi-project builds, I bet this is by far the simplest to use. And because you can integrate Groovy closures and methods into the build scripts, there's really no limit to what you can do.