You can try Viral URL. I just signed up with them today, and really like them. It will cloak your affiliate links before clicking and also on the affiliate page. When you sign up, they will try to upsell you. But you don't have to buy anything. I just signed up for free. It is easy to use. You just type in affiliate URL and it will give you cloaked URL. No code or file to put on a website. Plus viral url has option of emailing others and earning money from program. It is in my signature if you want to try it.