> I remember when OpenStack was a big thing, what happened to them? They were everywhere- free swag at events.

Still releasing software twice a year:

* https://en.wikipedia.org/wiki/OpenStack

Available as open source so you can self-deploy, or go with a vendor if you want some hand-holding / support:

* https://www.openstack.org/marketplace/distros/

Perhaps they were "everywhere" when they were newer and needed to get their name out there, but nowadays they're more established and so will come up in search and such as an option for those that want to run cloud (either for their internal needs, or as the basis of a public product offering).