Transparent Language

Develops and markets computer-aided language learning, foreign language reference and language translation products for the consumer, education, government and corporate markets.

relianceindiacall.com

Dial No Pin

Online retailer of prepaid international calling cards.

Rebtel

Online store that sells international calling cards at good prices.

Calling Mart

Retail store that sells online prepaid phone cards, refills, VOIP plans and wireless service plans. Great for calling nationwide, internationally or even locally.

Skype

Peer to peer internet voice service. Mac, Windows and Linux versions available. Users may call landlines and cellphones for a fee; users may call each other for free.