Ilias Lazaridis:
> when typing:
> talker.
> a list should popup, showing me the available methods and variables.
[...]
> or can you suggest me another free IDE product which has this behaviour?

Not what you're looking for, but: you can do this in irb. Search the
Rubygarden wiki for useful irbrc code, then you can do, e.g.:

	talker.m<TAB><TAB>

and you get all instance methods starting with m.

Malte