Housing, utilities, food stamps, etc. are usually coordinated with your state's department of human resources; here's my state, Maryland's site, for example:

http://www.dhr.state.md.us/

Some things might be more local, if you are in/near a big city but the State site should be able to direct you to them. However, also check your County's health department? Here's mine:

http://www.harfordcountyhealth.com/?page_id=129

They have some good links too (health clinics and food banks, for example, that might be available locally rather than state-wide).