ISRO is planning to launch the heaviest rocket ever in 2014 on an experimental flight. the later (better too) version of that rocket might be used to human beings on space missions, which would be quite a revolutionary achievement in the space research field for modern India.
The said rocket is likely to touch the sky in next January of the upcoming year. According to some relevant sources the Geosynchronous Satellite Launch Vehicle-Mark III (GSLV-Mk III) might be used to put in orbit communication satellites that are weighing between four to five tonnes. This simply means that this vehicle will eventually pack lots of transponders per launch.