This article was published in the Michigan State Law Review, cited by the Ninth Circuit Court of Appeals in upholding the legality of ranked-choice voting in San Francisco, and relied upon by the City of Minneapolis in successfully arguing for the constitutionality of IRV under state law. The author, Jeff O'Neill, has a Ph.D. in electrical engineering and a Juris Doctorate. During law school, Jeff was a summer intern at FairVote and the National Voting Rights Institute. He later went on to found OpaVote in 2011.
This is one of the primary advocacy organizations for RCV in the US.
This online election platform specializes in alternative voting systems. They offer an easy-to-use online interface for elections as well as an API for more customized integrations with existing systems. It is perfect for organizations that want to implement RCV with minimal effort.
This nationally recognized organization is regarded as the premier ranked-choice voting resource for voters, election administrators, policymakers, and candidates. They offer RCV consulting services, expert testimony, and implementation guidelines. They also produce the RCV Universal Tabulator and RCV Maps (RCV Multi-State Assessment Project).
This PDF from the UK-based Electoral Reform Society is a reprint of The Forgotten History of the Single Transferable Vote in the United States from Representation: the Journal Representative Democracy. It is a great overview of where the Single Transferable Vote (the multi-winner form of ranked-choice voting) has been used here in the US.