SeeThroughNY website: Search government payrolls, contracts, expenditures (state legislative expenditure reports and community projects), and other data.
Site is sponsored by the Empire Center for New York State Policy, part of the Manhattan Institute for Policy Research.
SeeThroughNY links to another site, OpenBook New York, to search state contracts. This site has a section for searching state agency spending by quarter. From the Office of the State Comptroller.