A few good sites for the purpose would be -
Economic Times - A part of Times of India group, it is one of the best source for investment options. Visit economic times.com
LiveMint - It is a collaboration between Hindustan Times and Wall Street Journal. Collaboration with WSJ ensures better quality. Visit www.livemint.com
EquityMaster - Provides information on stocks and markets. One can learn basics of each sector through this site. Visit www.equitymaster.com
Sharekhan - The premium investments portal since long, they have in-depth details of most sectors, but at a premium cost. Visit www.sharekhan.com
MoneyControl - This is the best in class investment portal. It has a lot of contents and analysis in an easy to read format.
There are some more like www.rupaya.com , PersonalFN, ValueResearch, MyIRIS etc