Baggage Allowance on International Flights vary with the airline, sector/destination, frequent flyer membership and other factors. Following are the links containing information on check-in baggage allowances on some popular airlines:

Air India
American Airlines
British Airways
Cathay Pacific
Continental Airlines
Jet Airways
Kingfisher Airlines
KLM
Lufthansa
Malaysia Airlines
Singapore Airlines
Thai Airlines

The following are the current baggage rules for Domestic travel:

INDIGO AIRLINES Business Description Economy Description Infant Description Cabin Description Not Applicable 15 Kgs Zero Kgs 7 Kgs JET AIRWAYS Business Description Economy Description Infant Description Cabin Description 30 Kgs 15 Kgs 10 Kgs 7 Kgs AIR INDIA Business Description Economy Description Infant Description Cabin Description 35 Kgs 15 Kgs 10 Kgs 7 Kgs GO AIR Business Description Economy Description Infant Description Cabin Description Not Applicable 15 Kgs Zero Kgs 7 Kgs AIR INDIA EXPRESS Business Description Economy Description Infant Description Cabin Description Not Applicable 20 Kgs 7 Kgs 7 Kgs JETLITE Business Description Economy Description Infant Description Cabin Description Not Applicable 15 Kgs 10 Kgs 7 Kgs SPICE JET Business Description Economy Description Infant Description Cabin Description Not Applicable 15 Kgs Zero Kgs 7 Kgs