Stockpile - Stockpile is a free online inventory system for small business and at home uses.
Robinhood - Free stock trading service.
Snipe-IT - Managing assets with a Google doc or a shared Excel spreadsheet is more common than you think.
Rally Rd. - Invest in blue-chip classic cars like stocks
PartKeepr - PartKeepr is an open source inventory management system that you can alter according to the particular requirements of your business or of the area from where you are operating.
Freetrade - Invest in stocks & ETFs for free, get started in seconds.