Beginning with the biggest one of them - Hindustan Unilever Ltd. Few months ago, a pack of 100 teabags of HUL's Taj Mahal wasn't being particularly satisfactory due to the continued in-cup tearing of teabags. Amazingly, a single e-mail resulted in a phone call within two days and the delivery of a brand new pack within a week. That was nice to realize - despite the size, volume, and brand, HUL cares about satisfaction of individual consumers.
As another unexpected instance, Cleartrip contacted me in response to a blopost. There was some confusion regarding the refund channel and some detailed communications ensued. Finally I got a refund of more than 2K. But more than that, I've been a loyal customer to Cleartrip since that day for booking all my tickets. At least they are responsive and I know that the company cares in case something goes wrong.
However, the best, and rather surprising, experience was with Kingfisher Airlines. I booked two tickets and when I wanted to cancel one and alter another, they told me, "Since the flight time has been shifted by more than 15 minutes (20 minutes to be precise), we will give you full refund on the cancelled ticket and free rescheduling for another." The real shocker was that they didn't even charge the price difference of over 2000 bucks upon rescheduling. Although one would rate it devoid of business sense, since after this experience, I'm willing to stick to Kingfisher than with any other airlines (specially Spicejet, which really behaves like shrewd and mean businessmen).
P.S. - If you've read the old post (The company you keep),