From past six month there has been a rather steep cut in voip rates to India. Call rates that hovered around 8-15cents/minute are now revolving around 4-10cents per minute thanks to increased voip competition among companies and also to drop in termination charges for international calls by Indian regulator called TRAI. Some of these operators with super Indian call rates are
1)nonoh.com 0.035$/min
2)voipwise.com 0.057$/min
3)voicestick.com .060$/min
4)penntytel.com .092$/min
5)mondotalk.com .0858$/min
Here operator 1 and 2 are from famous Betamax Group as there rates change quite frequently so beware.