Once I was searching for a guitar tab of a song (I'm Yours). I tried a few websites and most of them aren't free. Well, you got to pay or become a member of the website. After searching the tab for an hour, I still couldn't find the tab without paying or registering.
Luckily, I found a website http://www.ultimate-guitar.com and i tried it. I found the tab I wanted and it's free. But they're too many tabs there. Some tabs doesn't match while some does. So I got to try each tab.
But I still found the right tab at last. Thanks to that web, I found other tabs I wanted to find. You should check it out. It's resourceful.