First I'm sorry if my question is not sent to right place and again sorry if it's not smart enough.
Next I wonder why DJGPP as a very good 32-bit development system for DOS is free and why its great libraries like Allegro are free.
Do you think I should trust on it? Is it completely safe?
Using it, is it possible to need something in advanced rogramming that it's not free?
Sorry if my English is not perfect and Thanks for your help in advance.