This website produced by an organization that actively promoted introducing and instituting ranked choice voting in New York. Website includes multi-lingual guides to the process.
The RCVRC is a division of the non-partisan, not-for-profit Election Administration Resource Center. Their mission is to provide research, tools and documentation to educate the public about this voting method.
In addition to lots of background research, history and information, the website provides, ballot templates and downloadable, open-source software to tabulate ranked choice ballots.