If you want to use simple, easy to use and free technical analysis software then Sharekhan's Trade Tiger is best.
Other wise there are other software like: GCI, AmiBroker, Metastock, MetaTrader, Ninja Trader, etc! Some may require external data feed and some may not. Some are paid services and some are free! (Some paid software can be found in google for free!) You can check details at here: http://www.traderji.com/software/