9front is freely available to download right here! The code released by Bell Labs is available under a Lucent Public License, and 9front's modifications come to you under other, more permissive licenses.
Peruse the 9front source code repository in your browser! Or, if you'd prefer, that same link will work with an hg clone command on your favorite development workstation!
Just send an email to our bug-tracking mailing list Include as much information as possible relating to your troubles. You can use the sysinfo tool to collect some facts. Remember, 9front is a volunteer-run project, so we can't promise response times or results.
Joining the mailing list is as easy as sending an email that just says 'subscribe' to our community mailing list! Let us know how you're using 9front, what new programs you'd like to share, and get to know our close-knit community.
You can learn more about the now-defunct ancestor of 9front by visiting a mirror of its deceased website! There are other projects on the Internet which take inspiration from the innovations in Plan 9 from Bell Labs, but 9front is the most fun.