OptionBook

From The Applied Research Company:

Whether you're an option trading veteran or just starting out, you need the answers to two basic questions: How much is this option worth right now? How will its price change in the future?What you don't need is an expensive piece of software to give you the answers. OptionBook helps you easily value any stock, index, futures or cash option, and then lets you watch its price change under any market circumstances you can imagine.One of the secrets to successful options trading is an understanding of Implied Volatility. OptionBook is designed so that you can make this complex calculation with just one mouse click. Many option pricing software products don't even calculate Implied Volatility, but with OptionBook, you'll be able to understand of this vital trading concept in no time.OptionBook also calculates the market sensitivities (the "Greeks") in a flash. These numbers show how fast the option price changes, and they're valuable tools in tracking risk. If these frequently misunderstood calculations are "Greek to you", speed through the on-screen explanation of each, and youll understand them like a pro.