Agni, Prithvi, Aakash, Trishul & Nag are part of the IGMDP of Indian Missile Defence System which was started in 1983 keeping in mind the security threat posed to India from its immediate neighbours. Put together these missiles have a range from as low as 4 kms to more than 5000 kms. Brief on these missiles is mentioned below.
With a range of over 5000 kms, Agni V was successfully tested on the 19th April 2012. This is a huge leap in Indian Defence. Agni V has now joined select group of countries with such firepower, including US, UK, China, Russia & France. Agni V can strike all parts of China & most of Europe.
It is a medium range surface to air missile with a range of around 27-30 kms. Aakash Missile System, a fully indigenous missile system, was successfully handed over to Indian Air Force in March 2012. This missile is compared to the Patriot missiles of US & Barak missiles of Israel.
World's fastest Anti Ship cruise missile developed in collaboration with Russia. With a range of 290 kms, it can hit targets at altitude of as low as 10 meters at a speed of 2.8 mach. It has all Land, Sea, Sub-Sea capabilities. It's Air variant for Sukhoi 30 is being developed.
Prahar is a solid fuelled surface to surface tactical ballistic missile for short range up to 150 kms, developed for Indian Army & Air Force, by DRDO. It was successfully tested Integrated test Range (ITR) at Chandipur. It is launched from a platform of 6 missiles that can be ready in 2-3 minutes & have precision striking range.