Lightweight ioc-Container for Java?

Pico container or google-guice. See a comparison here.

Btw, few people will call spring "ligthweight", but it can be used as such with only the basic features. Hence it's included in the above comparison.

Silk DI is a 120K jar with no further runtime dependencies needed. So it is way more lightweight than e.g. guice or spring and still smaller as pico-container but has an even more powerful feature set. Also it doesn't cheat by splitting features into a separate additional jars like multibind for guice or the gems for pico-container.

Guice?

CDI? (almost the same thing as Guice, but is a JSR rather than proprietary)