scottrade does provide free quotes but I and many others noticed that their quotes are many times inaccurate or lagging. Be careful. I am unaware of another totally free service. If you open an Ameritrade account you can use their streamer. You pay inactivity fee of $5/mo. You can also open an account at MBTrading and use their navigator. No inactivity fee whatsoever. That's basically free quotes. eSignal offers "MarketCenter", quotes for stocks options and futures for $15/mo. Have fun 50
You can use QuoteTracker (http://www.quotetracker.com) with your brokerage account, subscription datafeed, or even Scottrader, though as it has already been said - Scottrade's datafeed is not something I would use when real money is on the line. QuoteTracker can be used for free or registered. Registration is included for MB Trading, CyberTrader, optionsXpress and XoomTrade clients.