Java, PHP, MySQL, Postgresql, OpenSSL, Linux come to mind.
Do people actually do this?
I don't know of any companies that are still using Coldfusion and I haven't had to touch it since 2012 (thank god), but it certainly was a common thing for awhile.
I feel like this narrative is still apples to oranges and the concerns expressed are more about managing the costs all the SaaS products, not having to pay...