Whats the best FREE compiler?

Like the subject says, whats the best FREE compiler? I have Dev-Cpp but I'm getting alot of error messages...

gcc is probably the best free compiler. Borland gives away its command line compiler but you will need to find a decent IDE to go with it. Dev-c is ok as an ide and as a compiler it uses mingw which is a port of gcc for windows.
To be honest they all have their plus points and negative points. A lot depends on what sort of programming you plan on doing. For windows dev-c is probably about the best you will get for free.

If you are thinking of spending a few pounds then Visual c++, codewarrior or comeau computings compiler which is only a front end for the EDG compiler all come recommended although I wouldnt buy visual c.net i would wait for visual c.net 2003 or everett or whatever they are going to call it. ( i think msvc 7.1 seems more common now) as it will finally be more or less standards compliant.

I want to make 2D games and once I get better at that maybe 3D games with OpenGL.

Borland?

If you are just learning and want to learn opengl then what i would do is to buy a book on c++ that comes with the introductory edition of msvc. This gives you a more than reasonable compiler for learning opengl and a book on c++ too otherwise stick with dev-c and learn to use it properly.