Nonprofits in Sacramento provide many of the local services such as foreclosure assistance, employment and unemployment resources, and food services. (Most of the other local services are provided by Government.)

The truly excellent Nonprofit Resource Center offers trainings, a nonprofit library, and other resources for nonprofits. The Walmart Foundation provides grants and other assistance to nonprofits.

For top of the line local volunteer matching you can check out Team Giving - Sacramento Volunteer. They do great work and connect businesses with volunteer opportunities.