What is the best online gambling software provider?

I am doing research for our online gambling guide GambleRock.com and would love to hear from the Casino Affiliate Programs community as to which online casino software provider has the best games and features. We’re developing reviews of the most popular gambling software providers and your comments and votes are both helpful and appreciated. If you’re an online gambler please share what games/features you like about your favorite casino software. For webmasters, please share which software providers have the best conversions and player retention. Thanks so much for your feedback and suggestions.