[onixs1]

I appreciate the time you have spent answering my question, I don't see much activity from the forum users, I want to think that it is a new project.

Without a doubt it is an excellent project, congratulations, these are my first days trying fossbilling and I have loved it.

I had been using whmcs, but with the latest changes they have been making I will not be using it anymore, and I found fossbilling, we definitely have to support this project more.

I will see if it is possible to add the ssl certificates through custom fields.

Thanks for your help

At the moment FOSSBilling doesn't have any functionality to sell SSL certificates I'm afraid.
Not sure when/if that would be added, you're the first person to have asked for it and I think these days most people expect free auto-generated certificates or will directly source ones from trusted certificate authorities if they are needing that for something like PCI compliance..
And yes you can donate to FOSSBilling!
There's a donation dropdown on the website which will let you select between donating via GitHub or OpenCollective.