Yes they are free. There are also many sites that offer free fonts. Just google it.
Ah, great... if the fonts included are free to use then I have nothing to worry about. I was just under the impression that because fonts like Arial aren't commercially free to distribute then royalties would need to be paid to use them..... however after looking into it more is it because they are only referenced from the user's system and not actually installed as part of the app that it is ok to use them? I'm sorry, I'm just not sure how it all works.