XMB is described as 'lightweight PHP forum software with all the features you need to support a growing community. With outstanding community support and contribution, you will find XMB to be easy to setup, customize, and enhance' and is an app in the Social & Communications category. There are more than 25 alternatives to XMB for a variety of platforms, including Self-Hosted solutions, Linux, Online / Web-based, Windows and Mac. The best alternative is Flarum, which is both free and Open Source. Other great apps like XMB are phpBB (Free, Open Source), Simple Machines Forum (Free, Open Source), MyBB (Free, Open Source) and NodeBB (Freemium, Open Source).
Flarum is free, open-source forum software with a focus on simplicity. You can use Flarum to easily set up a discussion forum for your website. Flarum is developed openly on GitHub. It is the combined successor of esoTalk and FluxBB. It aims to be:
Since its creation in 2000, phpBB™ has become the most widely used Open Source forum solution. Like its predecessors, phpBB™ 3.2 “Rhea” has an easy to use administration panel and a user friendly installation process, which allows you to have a forum set up in minutes.