The Basic Fantasy Role-Playing Game is a rules-light game system based on the d20 SRD v3.5, but heavily rewritten with inspiration from early RPG game systems. It is suitable for those who are fans of "old-school" game mechanics, and it's simple enough for children in perhaps second or third grade to play, yet still having enough depth for adults as well.
What Does It Cost?
Nothing. You can download the PDF files or the original OpenDocument (i.e. OpenOffice.org) files from the downloads page at no charge. Or, you can purchase a print copy from the storefront at Lulu.com, where the rules are available at cost.
You can learn more at basicfantasy.org