Hi,
I'm new both to this forum and to game dev.
I know that probably many people have already asked you this (please, don't kill me!), but... I need some suggestion to learn game development.
I'm a 3d hobbist and I want to make the jump to indie game development; I've some knowledge of C, but I'm willing to learn other languages. I know there are lots of tools around the web, but I haven't found the one which fits me. I'd like something easy but quite powerful, maybe an IDE that leaves all the graphical stuff beneath, so that I need only to write the game code. Something like Unity 3d, for example but free.
I know it would be better to learn how to use game library like irrlitch, etc... but I have just not enough experience to make a game totally by code. Otherwise a series of step to step tutorial for learning game coding would be appreciated.

Excuse me for bothering you (and for my English)

I've not used it, but you might want to take a look at dim3, which satisfies at least the 'free' part of your criteria

For future reference, threads with names like "A Beginner's question" are very unclear. A better name for this thread would have been:
"Which environment/IDE would be best for me to start out with"

That being said, Unity is really a 3D Hobbyist dream platform. It is really easy to get your assets in and just start using them.