Frash is a port of Adobe Flash runtime for Android to iPhone, using a compatibility layer, by comex. Frash can currently run most Flash programs natively in mobile Safari browser.
"Frash uses a multi-process model similar to Chrome on desktop, so a crash in Frash/Flash plugin doesn't take down browser. You can see this while I'm playing Alien Hominid: the ad above crashed (probably a Frash bug), but Safari stays open just fine, and continues to play other Flash content on the page," revealed.
Video and keyboard input are currently not supported.
More Info: Frash/Flash plugin