Bay Citizen, the nonprofit online news site that provides stories for the New York Times, is busy creating apps (online applications).

The first gives information on how much San Francisco workers make and where they live. For example, the San Francisco city workers living in Placer County brought home an average of $127,164 in 2009 — nearly three times the county’s average per capita income, according to Bay Citizen.

The second provides immunization rates among Bay Area kindergarteners.

Editor Jon Weber says the third app will be a comprehensive arts calendar for the Bay Area, in partnership with SF Arts. These apps are being created by a four-person tech team — CTO Brian Kelley, Software Architect Dan McComas, developer Aurelio Tinio, designer David Suriano and producer Tasneem Raja.