U.S. Government
Centers for Medicare and Medicaid Services
Internal Revenue Service
OMB Circular A-133, Audits of States, Local Governments, and Non-Profit Organizations
OIG database of excluded individuals and entities
Small Business Administration
US Dept. of Health and Human Services
US Dept. of Housing and Urban Development
US Gov. Printing Office
US Office of Inspector General
 

Connecticut 
State of CT
Department of Revenue Services
Department of Mental Retardation
Department of Children and Families
Department of Public Health
Office of Health Care Access
Department of Social Services
Mental Health and Addiction Services
Connecticut Council on Developmental Disabilities 
Office of Policy and Management
Consumer Price Index

Nonprofits
About.com- Guide to Nonprofit Charitable Organizations
Alliance for Nonprofit Management
America's Charities
Association of Small Foundations
Connecticut Association of Nonprofits
Contributions Magazine
Foundation Center
Fundraising Software Solutions
Grants.gov
Idealist.org- Nonprofit FAQs
National Charities Information Bureau
National Council of Nonprofit Associations
National Society of Fund-Raising Executives
Nonprofit GENIE
Nonprofit Resource Guide: A Directory of Organizations Serving Nonprofit Managers
The Nonprofit Times
United Way of America
Volunteer Match

Other links

American Association of Homes and Services for the Aging
American Health Care Association
CT Assisted Living Association
CT Association of Health Care Facilities
Empire Medicare Services
Financial Accounting Standards Board