Altruisto.com

A browser extension that allows users to raise money for highly effective, research-backed charities with no costs while shopping online. Users simply install the extension and when they buy online in one of 1000+ partner shops (including Etsy, Aliexpress, Barnes&Noble) portion of the money goes to carefully selected charities. That way they can support great causes and the stores gain clients incentivised to buy from them and not their competition.