Do you mean companies which sells technics? If yes, than newegg is that one which accepts bitcoin payments. I don't know correctly which companies accept bitcoins also but if I amn't wrong BitPay has partnered with many large merchants over the past year including Microsoft, NewEgg, TigerDirect, and Warner Bros Records. This companies were accepting bitcoin payments.
Actually the companies which accept bitcoin through bitpay shouldn't be considered as supporting bitcoin or cryptocurrency. They just use bitpay to get wider audience and promote themselves being first to accept bitcoin payments but on end they just convert their bitcoin to fiat and create sell pressure to market. This is not good or supportive action for bitcoin.