Robinhood - Free stock trading service.
Six Degrees of Wikipedia - Find the shortest path between two subjects
Scout Finance - Free finance app that's like having a Bloomberg in your pocket. Download:
Pathica - Find a path to connect with anyone on Instagram.
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
IconWorkshop - Application to create and manage software icons. A must for developers.