Robinhood - Free stock trading service.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Trigger Finance - IFTTT for the stock market
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
SysGears Grain Framework - The simplest way to start investing.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.