yeah i m talking more generally about their full list here: https://www.apache.org/

There are a lot of projects that were handed to Apache to manage. Kafka for example was initially created by LinkedIn. So yeah, you are right, big corps are actually creating those tools, and in addition to this, giving it away as open source to public.

Best part is that the tools are put into production before being open-sourced. In other words, they actually work.