Robinhood - Free stock trading service.
Stockpile - Stockpile is a free online inventory system for small business and at home uses.
Richie Invest - An app that lets you invest with your friends
inFlow Inventory - inFlow Inventory is inventory management software for small businesses.
Raiz - Invest spare change automatically from everyday purchases into a diversified portfolio.
Snipe-IT - Managing assets with a Google doc or a shared Excel spreadsheet is more common than you think.