ReProx Anti-CORS Proxy
This is totally just a rip-off of CrossOrigin.me. Except it's sloppily built and is made purely for demonstrative and practice purposes. Usage is relatively similar to the aforementioned tool. Simply prepend "https://www.quangdao.com/misc/reprox/" to any url, and it will return the exact response from the original source. ReProx is currently intended to support GET request, but in theory POST requests should work too. However, I've been lazy and have not done much testing with POST requests.
ReProx also supports converting XML files into JSON. Just add the query "asJson=true" to the url query string. Note that this has to be appended to any existing query string in the URL, so if one already exists, it must be added using "&".