Free Affiliate Link Masking WP Plugin

It's not cloaking, but it is masking, to make your affiliate links look like there are sub folders or your site. Often times it can be a turn off to a visitor to see a big nasty non-sense redirect url, but if you can make that url pretty and look like it's tied to your site, expect higher click through's. There are paid scripts out there that will allow you to mask your affiliate links, but