This paper describes WinKE, an interactive proof assistant, which is based on the KE calculus. The software has been designed to serve as a tutoring system supporting the teaching of logic and theorem proving through KE.
Endriss, U. (1999). An interactive theorem proving assistant. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 1617, pp. 308–313). Springer Verlag. https://doi.org/10.1007/3-540-48754-9_26