Isabelle Coinductive: This article collects formalisations of general-purpose coinductive data types and sets. Currently, it contains coinductive natural numbers, coinductive lists, i.e. lazy lists or streams, infinite streams, coinductive terminated lists, coinductive resumptions, a library of operations on coinductive lists, and a version of König’s lemma as an application for coinductive lists. The initial theory was contributed by Paulson and Wenzel. Extensions and other coinductive formalisations of general interest are welcome.