I don't know where this would fit in on the website but one company that is really important to boycott is Oracle. Larry Ellison is a mega right-wing donor and his son is buying up media companies for the purposes of turning them into right-wing propaganda machines.

One way everyone can make a difference is by uninstalling any Oracle software on your computer. You might have the Oracle JRE installed or if you're into virtualization you may be using Virtualbox. It's especially important to avoid Oracle software in a corporate setting because their lawyers may come after you. If you work for a company and you're either involved in purchasing software or a software developer I would strongly recommend avoiding Oracle not just because of ethical reasons but also because typically they have their products are not as good from a technical standpoint as well.

For the Oracle JRE or JDK you can replace it with Adoptium. Adoptium is run by the Eclipse Foundation which is based in the EU.

For Virtualbox you can replace it with QEMU or Xen. For QEMU there are a lot of good GUI or CLI front-ends that make using it easy. See this article: https://wiki.gentoo.org/wiki/QEMU/Front-ends note that some of the front-ends listing in that article also support Xen.

For Oracle's database some say that PostgreSQL is a good competitor. For this one I acknowledge the topic is more complex. I'm just going to leave it at for new designs please consider avoiding Oracle's database if you can. Oracle has a bad reputation among programmers for a reason.