A Spring competitor from Google
I notice that Bob Lee, the same Bob Lee that famously "doesn't get Spring", has created a competitor to Spring IoC called Guice (pronounced Juice).
He says:
We're pleased to announce the open source release of Google's internal Java dependency injection framework Guice. Guice wholly embraces annotations and generics, thereby enabling you to wire together and test objects with less effort than ever before. Annotations finally free you from error-prone, refactoring-adverse string identifiers.
Links:
Update: Both Dion and Klaus (below) pointed out that I meant Spring IoC and not just Spring, which is a fair point.