Relief - The free app that gets rid of your credit card debt
Robinhood - Free stock trading service.
Qapital - Qapital is an easy to use Finance application that allows you to save money automatically and take control of your spending.
Trigger Finance - IFTTT for the stock market
Digit - SMS bot that monitors your bank account & saves you money
SysGears Grain Framework - The simplest way to start investing.