SparkFin - Learn the markets for free, profit forever.
Richie Invest - An app that lets you invest with your friends
Robinhood - Free stock trading service.
Rally Rd. - Invest in blue-chip classic cars like stocks
StockTwits - A financial communications platform for the investing community.
Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues