The Big gEDcom site has pre-revolutionary tax lists, baptismal records, burial records, militia lists, more. Search here . New York Tom Lynch's Northeastern New York Genealogy Home Page has alpha indexes, not searchable. The Olive Tree Genealogy - Canadian, New York, New Jersey, and other New World data. Lots of info, most not searchable.
Search feature is at bottom of page.
Westchester County Archives - alpha indexes to some holdings. Original County Estates Papers Index - alpha index.