TV Channel apps.

I'm a UK user.

I have what I believe to be a good quality TV (picture wise) with excellent upscaling ability in my lounge, unfortunately the tuner in it failed a month or two back. I was on the verge of replacing it when the new Apple TV came out with the TV Player app being available on it. It covers many but not all channels I'd get on Freeview. I was just wondering if anyone had come across any similar apps that might fill a few gaps of not having the ability to receive OTT broadcasts.