National Stock Exchange (NSE)

http://www.nse-india.com 

Bombay Stock Exchange (BSE)

http://www.bseindia.com

SEBI

http://www.sebi.gov.in

MCX

http://mcxindia.com

NCDEX

http://www.ncdex.com 

NSDL

http://www.nsdl.co.in

FMC

http://www.fmc.gov.in

CDSL

http://www.cdslindia.com

NSE - Company Results

http://www.nseindia.com/marketinfo/companyinfo/online/resultslist.jsp 

NSE - Auction List

http://www.nseindia.com/marketinfo/eod_information/auction.jsp

NSE - Corporate Announcements

http://www.nseindia.com/marketinfo/companyinfo/online/announcementslist.jsp

NSE - Quotes

http://www.nseindia.com/content/equities/cmquote.htm

NSE - Trade Verification

http://www.nseindia.com/content/equities/eq_trdverify.htm

BSE - Company Results

http://www.bseindia.com/qresann/compres.asp

BSE - Company Shareholding Pattern

http://www.bseindia.com/shareholding/sharehold_search.asp

BSE - Company Important Announcement

http://www.bseindia.com/qresann/announce.asp