SparkFin - Learn the markets for free, profit forever.
Robinhood - Free stock trading service.
Richie Invest - An app that lets you invest with your friends
StockTwits - A financial communications platform for the investing community.
Rally Rd. - Invest in blue-chip classic cars like stocks
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