Not all are easy to boycott
US products > GitHub, Steam (Valve), Dropbox, Oracle, nVidia, Intel, IBM, eBay, Amazon, UPS, FedEx, Pepsi, CocaCola, Microsoft, Google, Pfitzer, Nike......., Which of these support Trump and needs to be avoided because of this? Not even FOSS is a Guarantee. Gimp, GNU Project, Mozilla.org, TOR, even a lot of Linux distros are from the US
Full list of US companies https://fortune.com/ranking/fortune500/?global500_y_n=true