Mobikwik.com is quite popular website for online recharge. I have used their services couple of times with success. Apart from mobile recharge, this website also provides services like paying bill or recharge on dish tv, reliance, tata sky, airtel digital TV, Videocone d2h, Sundirect etc.
It also provides you the service to recharge or pay bills for DATA CARDS like Relinace Netconnect, Tata Photon, MTS, BSNL, Vodafone, Idea etc.You can even pay utility bills like electricity, landline, gas bill, insurance premium via this website.
They also provide shopping, fooding, online movie show booking facility on some cashback sites.I have often noticed that they are offering cash back for online recharge on their site. It is indeed a good option and I got my cash back. So, they are real and genuine in the industy.
They will be soon introducing " Money Transfer" option on their website.Once I have faced some issues while doing online recharge on the site. There was a server up gradation going on, but nothing was mentioned on the home page and it took almost 24 hours for a successful online recharge.
Again, their log in interface is not user friendly. New people often do not find the "sign in" button easily. They should revamp the site design too.
Still, I am recommending this site, as I use it frequently and no money wasted till now. Overall, a good website with good experience.