"Hive is free and open source"

Indeed: https://hive.apache.org/

The link is in the article - https://github.com/nytlabs/hive

I think the OPs point was that there is already a popular open source project named Hive.

Which is quickly becoming a tedious exercise in cheap point scoring. People go for names that reflect the intent or otherwise associate with the system they are building. They also prefer existing words. Sometimes that will mean reuse of the same words. Lets accept that and move on with our lives.

The are so many names available, why choose this one?

"hive" really? google the name first??

Sooner rather than later it will become impossible to avoid naming conflicts for open source projects (or any projects) if you want a meaningful name.