[InTrade is #1 but their software is not yet available for enterprise prediction markets, as I understand it.]
#1. NewsFutures
#2. Inkling Markets
#3. Consensus Point
#4. Zocalo
#5. HSX Research
Source: The Google Search ranking of the “-prediction markets”- webspots…-
External Link: Jed Christiansen’-s review of the software providers of enterprise prediction markets. (I will take a deeper look to it at a later time, and will maybe blog about it.)