I have an app called "PV p" which stands for porn video player. it links to other porn sites to stream video. it has 6 or 8 site links to choose from but i use the PornHub link cuase the vids are free where as the link to Brazzers wants you to sign up.
Here is the problem... i have it on my phone and have been using it regularly but when i told my friends about it ... they cannot find it, and for that matter i can no longer find it in the market. there is no website listed within the app. there are no publishers notes or credits just a disclaimer that says this app only links to sites doesnt actually host them. so the answer to your question is Yes there are XXX aps but i cant help you find it... sorry - Good Luck