A great generic RPG system with a rules set that has been around for a long time.
This pdf isn't just a simple rewrite of the horrible d6 rulebook that came out in the mid-1990s, instead, this is a combination of the best features from a variety of WEG's d6 games.
For those who haven't ever used d6, its a very easy to learn dice-pool system that's fast paced and fun to play.
Unlike d20 games, you can make characters in about 5 to 10 minutes.
Layout is suitable for printing, but nothing special. There are several (but not a lot) of line art drawings throughout the book.