Good idea. My contribution is not really cool, but maybe useful to some. Since I belong to quite a few affiliate programs, trying to remember the code for each program is a nightmare so I normally create folders that include a meta refresh tag that goes to the merchant site.
So instead of logging into PayPal, for example, to get my affiliate code each time, I create a folder on my site called paypal and create an index.html file that contains the following code...
HTML Code:
<html>
<head>
<meta http-equiv="Refresh" content="0; url=http://www.affiliate_URL_here.com/">
</head>
</html>
So when I link to mydomain/paypal it automatically goes to my affiliate link. Good trick to use if you have a lot of affiliate programs to promote.