Most/many tools require certification. Certification requirements vary from thing to thing, sometimes have prerequisites and sometimes can only be done by one or a small set of trainers. Information about how to get certified may be explained in deteail on the tool's wiki page, and is likely to be discussed on the mailing list/Google group. For some of the more common certification schemes, here is a quick reference: | Most/many tools require certification. Certification requirements vary from thing to thing, sometimes have prerequisites and sometimes can only be done by one or a small set of trainers. Information about how to get certified may be explained in deteail on the tool's wiki page, and is likely to be discussed on the mailing list/Google group. For some of the more common certification schemes, here is a quick reference: |