John Locke teaches a number of options trading strategies he has developed himself (with a particular emphasis on butterfly spreads). The programs include The M3, Bearish Butterfly and The Rock. Twitter: @locke4success
ORATS is an options data provider covering historical volatility, dividends, earnings modeling techniques and back-testing facilities (amongst others). The data is accessible via an API and associated Excel-based tools. Twitter: @optionrats â€
A sophisticated backtesting platform for options strategies. OptionStack has a visual environment for building strategies and it is also possible to use Scala to code them. There are various pricing plans available, including a free edition. Twitter: @optionstack
Rachel Shasha's blog with market commentary, discussion of technical signals and options open interest. A premium subscription area with more detailed analysis and a private twitter feed is also available. Twitter: @Sassy_SPY
Joe Kunkle's site combining software tools for scanning for potential options trades and access to his insights and sample portfolios. Twitter: @OptionsHawk
