Where can I get Borland C++ Builder 5.0 trial?
I've tried to google that, but it is so hard to find a proper legal link :)
C++ Builder 5.0 was released in 1996 and superseded in 1997. I suspect the closest legal trial of a recent product you'll find is C++Builder XE3 from Embarcadero that took over the Borland products:
http://www.embarcadero.com/products/cbuilder
Or if Builder 5.5 is suitable try here: