I normally use stackshare. It doesn't show you usage as reported by the people running the tools but it has a decent community size and seems to be gaining more use rather than less.
It lets you compare tool features, community popularity and shows you who else is using those tools in their stack if that matters to you.
Although not entirely relevant to your question in terms of popularity, devops bookmark is a very nice website which helps discover tools and frameworks in the DevOps landscape.
You are also able to filter tools and frameworks which works with different languages, platforms, licenses and topics which is really handy!