Eclipse Code Recommenders
Thanks to @Vogella I have found out lately about Eclipse Code Recommenders.
For anyone using Eclipse or considering a switch from other IDE check out this: Eclipse Code Recommenders
This is in my opinion the way to go for the IDE but I wonder how good this can actually get, anyway looks interesting though.
What you get with code recommenders:
1. Intelligent Call Completion
2. Dynamic and Example-driven Template Completion
3. Java Chain Completion
So far it covers quite a short list of classes/functionality but anyway still impressive.
There is no stable release yet. More details on the mentioned website above.
Check out the website for more details.