Could any body kindly tell me which software's are used to develop a game and in India which software or programming language you should be aware of in order to get a job in the gaming company (Company which develops games)
Depends on the platform. On mobile phones I guess Objective-C (iPhone) and J2ME (almost every other mobile-phone) is the way to go. For consoles (Playstation, XBOX, etc.) it's usually hard to get a SDK even though there are for almost every platform a homebrew scene which provides some toolkits (exception is XNA from Microsoft which let you program the XBOX 360 in C#). For web-games: PHP, Flash, Java...
On major PC titles C/C++ is still broadly used even though you can find some exceptions where e.g. Java is used.
For scripting LUA seems to be used quite often.
I would read some job-postings of companies in your area, to find out which requirements they have. Further I would suggest to have a look at the "usual suspects" in the internet, like http://www.gamasutra.com (especially the post mortem articles are always quite interesting) or http://www.gamedev.net/