Path of Legends Podcast, the Adventurer Conquerer Kings System was brought up in regards to how it handles characters dipping down to and below zero hit points. My cohost, +Vincent Florio mentioned that ACKS had a System Resource Document (SRD). I didn't believe him at first but he found the link. Vince was right. ACKS has an SRD.
Here's the ACKS SRD link. The chapters are in plain text, it's no frills but it's definitely useful and even better, it's free ;)
Strangely enough, I was supposed to play in the first session of ACKS for my gaming group in a couple of years last night, but I was exhausted from a week of illness and an afternoon and evening of socializing with my old gaming buddies. I'll have to wait till next week.