I'm looking for a good translation software. i do not mean something that does all the translation automatically for me.

But rather something that aids me in translating large pieces of text, since it has to be a perfect translation i can't leave it to computers alone.

Something like http://translate.google.com/toolkit but with more options/functions would be great. Preferably freeware ofcourse (But paid is not a problem). At the moment i use the Google toolkit since it's adequate for now, but i really need something more advanced.

But looking for such software on google etc. is really hard because of the confusion with translation services and things like babelfish.

Do you know any software like this? and maybe want to share your thoughts/experiences.