Here are some good proxies:
Choose "Remove scripts to remove javascript if the website when it.
http://www.sunclap.com or https://www.sunclap.com
http://www.coffeetoast.com or https://www.coffeetoast.com
http://www.fingerfactory.com or https://www.fingerfactory.com
http://www.yellowcream.com or https://www.yellowcream.com
http://www.slimypuppy.com or https://www.slimypuppy.com/
Join mailing list to get new sites so you can use other sites when those sites get blocked. You get new proxy every 3 or 4 days
Use the middle one: "glype" if you want to download large files (large than 9MB).
Use the https proxy if you don't want the proxies being detected and are blocked so quickly.
Type the proxy address on google to get more proxy websites if all of the above are blocked. There are lots of them.