This was a somewhat difficult question to find information on, but if you have specific development projects to search on as keywords, you should be able to find more in the databases mentioned in the answer above.

Also, here is a smattering of local organizations that deal with issues of economic development, gentrification, homelessness, and policing and criminal justice. They might have more insight into your questions:

FUREE: Families United for Racial and Economic Equality
Develop Don't Destroy Brooklyn
More Gardens!
Picture the Homeless
Critical Resistance NYC
The Malcolm X Grassroots Movement (has a NYC chapter, based in Brooklyn)