Being a long-time Eclipse power user, I'm totally addicted to the Smalltalk-style package and class browser it presents in the Java Browsing perspective. Is there anything similar for IntelliJ?
Note: I'm not looking for IntelliJ's Project window; that's more like Eclipse's Package Explorer or Project Explorer.
You can achieve something similar with opening these tool windows:
Then you can rearange the windows to match your preference - see attached screenshot.