Which companies are doing High Frequency Trading in India?

As you know, it's become a very hot area of attention in the US, particularly after a high-profile criminal case involving Goldman Sachs came under the media spotlight.

I'd read about some group calling themselves IndiaBulls becoming a newly-arrived hotshot in this area, in the past couple of years.

Does anybody have any information on the technical details of such operations in India?

I'd also particularly like to ask about such trading in connection with commodities/futures markets in India.

Anybody have any info, or know where to get it?