Russia has been an important supplier of defence goods for several decades. Today, the cooperation is not limited to a buyer-seller relationship but includes joint research and development, training, service to service contacts, including joint exercises.
India and Russia have several major joint military programs such as those mentioned below:
BrahMos cruise missile program
INS Vikramaditya aircraft carrier program
5th generation fighter jet program
Sukhoi Su-30MKI program (230+ to be built by Hindustan Aeronautics)
Ilyushin/HAL Tactical Transport Aircraft
T-90S Bhishma program. (1000+ to be built in India)
Akula-II nuclear submarine (2 to be leased)
Tu-22M3 bombers (4 ordered)
US$900 million upgrade of MiG-29
Mil Mi-17 (80 ordered)
Ilyushin Il-76 Candid (6 ordered to fit Israeli Phalcon radar)
However recently Admiral gorshkov was said to be incorporated into indian navy under the tag of INS Vikramaditya at a total cost of over 3 billion $..