Check out Robinhood if your are interested in doing your own investing and saving on commissions.
Fidelity has some great mutual fund investments and retirement plans with low fees as well as plans to let you do your own investments with little to no fees.
Vanguard has mutual funds, IRA's, 401k plans and more.
Motley Fool has some great investment ideas and tips for you to help you make money on your investments.
The Governement SEC Investor website has wonderful investment information on how to protect your investments as well as other information.