Identify all public chain projects on github

I would like to ask you two questions.

  1. Can users identify all public chain projects on Github?
    2.Is there a clear difference between a common open source project set up on Github and a public chain project?
    The original purpose of the question was to screen out the public chain projects on github.

Hi, what exactly do you mean by “public chain projects”?

Firstly,thanks for your reply.
“public chain projects” are like BTH,EOS,which are different from the alliance chain and private chain in blockchain projects.

Actually, I saw an article published by Deloitte in 2017, in which it mentioned identifying the key words of the blockchain from github API(To identify relevant projects, we queried the GitHub API about keywords associated to blockchain projects), so as to obtain the data of all the blockchain projects.

I am very curious about how to identify blockchain projects from massive github projects, so I want to know how can i find the key words of the blockchain.