I want to use Hibern8IDE, but can't find it.
Downloaded hibernate-extensions-2.1.3.zip, as instructed on www.xam.dk/hibern8ide, but hibern8ide.jar is not there, nor is net.sf.hibern8ide.Hibern8IDE.
Am I missing s.th.?

its called hibernate console in that release.

Thanks for the hint. Maybe the webpage should be updated to reflect that change.
Is there any docu on how to use the console?

there is the readme, but otherwise its in the viewlets.

the upcoming release will have more detailed docs.