You've likely seen this already but, just in case, here's a list of companies still doing in Russia. You can filter and sort it by a variety of attributes like name, country, industry sector and some general categories to describe the actions they've taken (e.g. "Digging in", "Scaling back", etc.). They also link to this site which provides E-mail and social media contact info if you would like to add your voice to those already calling for them to stop doing business.

At this point, I'd be surprised to see too many of the companies that haven't pulled out already see the light and make significant changes but it can't hurt to maintain some level of pressure and visibility due to their actions (or lack thereof).