Agency for Federal Courts - http://www.bop.gov
The Federal Bureau of  prisons protects society by confining offenders in the controlled environments of prisons and community-based facilities that are safe, humane, cost-efficient, and appropriately secure, and that provide work and other self-improvement opportunities to assist offenders in becoming law-abiding citizens.

Corrections.com - http://www.corrections.com/links
Resources links

Federal Bureau of Investigation (FBI) - http://www.fbi.gov
FBI site

Federal Judicial Center - http://www.fjc.gov
Education and research

National Crime Information Center (NCIC) - http://fas.org/irp/agency/doj/fbi/is/ncic.htm

National Institute of Corrections (NIC) - http://nicic.gov/

US Courts - http://www.uscourts.gov/court-locator
Federal courts location by section in U.S.