This is the source for the Racket packages: "htdp", "htdp-doc", "htdp-lib", "htdp-test".
Contribute to Racket by submitting a pull request, reporting an issue, joining the development mailing list, or visiting the IRC or Slack channels.
Racket, including these packages, is free software, see LICENSE for more details.
By making a contribution, you are agreeing that your contribution is licensed under the Apache 2.0 license and the MIT license.