I sometimes visit these particularly those offering CrowdFlower tasks "non-BTC sites" and some other PTC and smaller task sites too but I don't know if any BTC site offers CrowdFlower tasks currently. I'm not sure why since there rates are good compared to typical PTC rates and they have plenty of tasks.
We offer CrowdFlower tasks at
www.bitcoinget.com. Compared to other sites, we have more tasks available, and we pay higher for the same tasks. If you have any questions, feel free send us a PM.