1. Research and Analysis Wing
The primary aim of RAW is to monitor the movement and activities of the neighboring countries. The agency came into being after the Sino-Indian war of 1962 and the India-Pakistan war of 1965, which exposed gaps in intelligence gathering undertaken by the Intelligence Bureau. Prime Minister Indira Gandhi and her government thus felt the need for an agency that would raise an alarm, and protect India before it went to war, or was hit by a terror attack.
Mossad has been a part of some of the most daring undercover operations in the world. This special operation and foreign intelligence agency launched operation 'Wrath of God' to track down and kill all the PLO activists responsible for hostage and killing of 11 Israeli athletes at the Munich Olympics in 1072.
3. Central Intelligence Agency
The CIA is one major reason behind America’s domination over the world. This agency plays a vital role in maintaining the USA's position as a superpower and mediate foreign policy intelligence and analysis countrywide. For doing the same, the CIA once owned dummy corporation, "Air America," that operated as a civilian airline but was used to conduct military operations in Laos, Indochina border, etc.
4. Military Intelligence, Section 6
MI6 is one of the oldest intelligence agencies and has existed in various forms since the establishment of a secret service in 1569 by Sir Francis Walsingham, who became secretary of state to Queen Elizabeth I. It was constituted in its present form in 1909 by Commander (later Sir) Mansfield Cumming as part of Britain’s attempt to coordinate intelligence activities prior to the outbreak of World War I. Even today the agency works with top agencies like the CIA to helps them in their missions.
5. Australian Secret Intelligence Service
Australian Secret Intelligence Service aka ASIS is the Australian government intelligence agency responsible for collecting foreign intelligence, undertaking counter-intelligence activities and cooperation with other intelligence agencies overseas. For more than twenty years, the existence of the agency was a secret even from its own government. However, once came into limelight, it was examined by the Royal Commission thrice for its operations in the year 1974 and 1983 and in 1994.
According to scoopwhoop.com