Financial Industry Regulatory Authority ("FINRA")
Category: Investing Education and Training
The Financial Industry Regulatory Authority ("FINRA") is the largest non-governmental regulator for securities firms doing business in the United States. FINRA is committed to protecting investors and the market through regulation, compliance, and technology-based services. The FINRA website helps investors check the backgrounds of investment professionals and their firms. FINRA currently oversees more than 5,000 brokerage firms, 174,000 branch offices, and 677,500 registered securities representatives.
http://www.finra.org

Lind-Waldock
Category: Commodities and Futures Investing
Founded in 1965, Lind-Waldock is one of the top futures brokerages in the United States. Lind-Waldock offers futures products and brokerage services to individual and institutional investors. Their website lets traders access more than 700 global futures markets and an array of trading tools and tutorials. Lind-Waldock was the first futures broker to develop an electronic order-routing system and online order-entry platform.
http://www.lind-waldock.com