The three major players for this market in no particular order are:
ARM with Mali graphics IP.
Each have their particular strengths and weaknesses across technical and business characteristics. Through various corporate and advisory roles in the Android / consumer space I've seen them all.
Replay available now: A handful of emerging network technologies are competing to be the preferred wide-area connection for the Internet of Things. All claim lower costs and power use than cellular but none have wide deployment yet. Listen in as proponents of leading contenders make their case to be the metro or national IoT network of the future. Rick Merritt, EE Times Silicon Valley Bureau Chief, moderators this discussion. Join in and ask his guests questions.