After 6 months I finally managed to develop a - in my opinion - solid forum system that only has the basic functionality and can be used in production for everyone. That's why I release the source code now with support.
A demo can be accessed at https://forums.teunstrik.com. Feel free to test.
Clone the code
Navigate to the working directory
Run composer install
Rename .env.example and change the settings (i.e. DB, URL, etc)
Run php artisan migrate --force
Run php artisan db:seed
Then it worked. If you get forbidden errors or something like that, you'll probably have to check if your webserver is set up correctly for Laravel apps.
ForumDirect is licensed under the MIT license.