Note:  These sites are not maintained or part of the NYCATTAR web site..  Several of these web sites are maintained by individuals, others by non-profit organizations that may or may not have a  membership fee.  Some of these organizations offer unlimited access to their web sites, while others have a "members only" area.  Whether you consider membership in these organizations to gain access to restricted areas is entirely up to you.  Some have a nominal membership fee, others are more substantial.