Justman10000 Laravel Forge is for deploying applications, a tool to install and update applications. It is not an application, framework or forum software, see https://forge.laravel.com
Jon97 laracasts is actually running its own forum engine which they built by themselves. A year or so ago they might have taken some inspiration from Flarum during a redesign though, so that might confuse a little. I'm glad Laracasts turned out so pretty, I highly respect Jeffrey's efforts.