Here's the contributors page[1]. He's clearly the core contributor, but there are a handful of other significant authors and dozens of minor contributions[2].

Here's the contributors page[1]. He's clearly the core contributor, but there are a handful of other significant authors and dozens of minor contributions[2]. [1] https://github.com/ovity/octotree/graphs/contributors https://github.com/ovity/octotree/graphs/contributors [2] Not to diminish the effort of submitting even a one-line PR, just in the sense of "de minimis" in terms of copyrightability.