Here are a few more resources for urban studies and planning with a critical analysis

Alternatives for Community and Environment

Causa Justa/Just Cause

Center for Urban Pedagogy

City Life/Vida Urbana

Congress for New Urbanism

Families United for Racial and Economic Equality

The Guardian: Cities

Just Sustainabilities

Invisible Cyclist

Movement Generation

Next City: Equity Factor

Occupy Our Homes – Atlanta

Practical Visionaries

Project for Public Spaces

Public Advocates

Right to the City

Sustainable Cities Collective

The Urban Institute