Australia National Security - Listing of Terrorist Organisations: Official government list of the 17 terrorist groups with dates listed and re-listed.
Bob Cromwell - Separatist, Para-military, Military, Intelligence, and Political Organizations: Overview of each group along with links to their official websites and other sites associated with them.
Canada National Security - Listed Entities: Official government list of the 35 terrorist groups for the purposes of Part II.1 of the Criminal Code.
CNN: Britain lists terrorism act groups: Britain's pre-9/11 announcement of their proposed anti-terrorism law which would ban 21 radical groups, including Al-Qaida.
FAS - Liberation Movements, Terrorist Organizations, Substance Cartels, and Other Para-State Entities: Profiles of several hundred groups, as well as related documents gathered from a variety of sources. From the Federation of American Scientists.
Guardian Unlimited: US moves to freeze terrorist funding: List of the 27 individuals and organisations whose assets have been frozen to strike at the "financial foundation" of terrorism, also including a corporation that serves as a front for terrorism and several non-profit organisations. UK.
Guardian: The US state department's terror list: Article by Mark Tran on the listing of the Real IRA and other groups as 'designated foreign terrorist organizations.'.
Time.com - The Ocalan Trial: Freedom Fighters: Analysis drawing from worldwide examples explains why some rebels are successful and some aren't.
UK Home Office - Security: Proscribed Terrorist Groups: Information about the international and Irish terrorist organisations currently proscribed (or outlawed) under UK law.
US Department of State - Fact Sheet: Foreign Terrorist Organizations (FTOs): Current listing of the Designated Foreign Terrorist Organizations (FTOs). Includes legal criteria and ramifications.
Wikipedia - Terrorist Organizations: Hyperlinked list of terrorist organizations, defined as armed groups using violence to target civilians in order to achieve political goals by creating an atmosphere of terror in the attacked population.