There are none. When activists say "free as in speech, not as in beer," they mean "What we really *care* about is free as in speech software, i.e., the ability to inspect, modify, and redistribute the source, and provision gratis (without charge) is merely a precondition for that."

I'll quote from the manifesto: "... requiring that users pay, in money or in kind ... is tantamount to not granting the freedoms in question, and thus renders the program nonfree."

I have purchased libre software. An example is RCU (reMarkable Connection Utility): http://www.davisr.me/projects/rcu/