How to monitize my forums?

[Sprisa]

I want to add groups that can be get from donating, anyone know any addons?

 

[Nicolas FR]

Yes, XenForo !

Users - XenForo 2 Manual

xenforo.com

 

[Mendalla]

I want to add groups that can be get from donating, anyone know any addons?

So just to be clear about nicodak's answer, user upgrades and promotions are a feature of the base software. No add-on should be needed unless you have a weird use case that doesn't fit that functionality. And his link will give you the appropriate section of the manual. I don't use paid upgrades myself, but those who do seem happy with them.