I`m having problem to organize my users.

I use a few Zoho applications (Zoho Invoice, Zoho Books, Zoho Creator, Zoho Projects, etc.)

As i`m using it as developer/adm account i have no problem using Zoho to me, but my question is how to organize a few others users to have access to the same applications i`m using.

Should I just invite who is on my domain? Google Apps to login would be great to me, but how can i configure that?

Thanks,

Kleber Alcatrao