Firstrade.com - An online broker that starts you off with 100 commission free trades.
Scottrade.com - A popular online trading house with 320 local branches, low minimum account opening balance of $500.
TradeKing.com - A top rated online trading firm as noted by Barrons and SmartMoney.
OptionsXpress - online options and stock broker, highly rated by Kiplinger's.
Vanguard - one of the biggest boys in the business has its own online brokerage service, too.
AnalystsEdge.com - A news aggregator and community for financial information.
BullPoo.com - A community that lets you trade information with others via blogs and discussion.
Covestor.com - Show off your trading skills, track others, even earn fees from allowing people to follow your trades after you've proven yourself.
FelingBullish.com - A social network for investors with analysis and blogs.
PredictWallStreet.com - Use charts, news, and information to help make predictions in this community.
SocialPicks.com - A social community for investors to trade tips and track performance.
SteamStreet.com - Track your portfolio, get investing ideas and discuss them with others.
StockFiend.com - A social network for people looking to learn about stocks, share tips, and make friends.
TheUpDown.com - A social network for investors to share information and try to form more well thought out investing strategies.
Wikinancial.com - A virtual stock market site for you test your strategies and compare them with others.
SaneBull.com - Helps you with your financial news by putting it all in one easy place.
Stocks.us - A start page for anyone interested in stocks.
WallStreetIdol.com - Compete with friends and complete strangers to see who the real Wall Street Wall-Street-Layoffs Idol is.
Herdst.com - Manage your portfolio online and share it with friends.
Stockalicious.com - Track and evaluate your investments to improve your performance.
StockPickr.com - Enter your portfolio and get suggestions of where else you can look for more investments.
CakeFinancial.com - Watch the portfolios and real-time trades of top investors, friends, family, and learn from them.
ChartSetups.com - Offers analysis on stocks, day trading, investing, stock charts and more
ETrade.com - Offers lots of tools to help you maximize your portfolio.
GStock.com - Using an architecture similar to the Seti@Home program, GStock leverages the unused computing power out there in the world to project stocks for up to 10 years.
Investools.com - Offers courses in trading and investing.
Marketocracy.com - A site that attempts to find the best investors in the world and let you track what they do so you can follow along and learn.
MarketSimplified.com - A centralized site for charting, portfolios, risk assessment and more.
MyTrade.com - A source for all your financial news and is fully customizable.
Schwab.com - Get advice from one of the largest financial service providers in the country.
SeekingAlpha.com - Brings together investment advice from blogs, money managers, and investment newsletters.
SmallCapDirectory.com - Search over 18,000 small cap and micro cap stocks.
StockCloud.net - See which companies release the most press releases in a tag cloud like setting.
Tipping Monkey - Learn how to do trades and play the stock market while only risking virtual money. (via)