- ARP – Associação pela Reforma Prisional
- Association for the Prevention of Torture
- Commission on Safety and Abuse in America’s Prisons – Confronting Confinement
- The Center on Juvenile and Criminal Justice
- Depen – Departamento Penitenciário Nacional
- Directgov – Crime and Justice – Sentencing, prison and probation (UK)
- Federal Bureau of Prisons (USA)
- The Howard League for Prison Reform
- Human Rights Watch – Search prisons
- International Centre for Prison Studies (UK)
- Justice Policy Institute
- Nacro (UK)
- The National Archives -Â Justice and Victims – Prisons (UK)
- NCJRS – National Criminal Justice Reference Service -Â Corrections
- O que são as Penas Alternativas?
- Penal Reform International
- Prison Activist Resource Center
- Prison Reform Trust (UK)
- Private Prisons: Profits of Crime
- The Sentencing Project
- Unlock – The National Association of Reformed Offenders (UK)
- World Organization against Torture