Robinhood - Free stock trading service.
Stockpile - Stockpile is a free online inventory system for small business and at home uses.
Bux - Casual stock trading - thumb swipes only
Snipe-IT - Managing assets with a Google doc or a shared Excel spreadsheet is more common than you think.
Contora - Alternative data on the companies activity on the web for retail traders
inFlow Inventory - inFlow Inventory is inventory management software for small businesses.