Let's fact it... having an interactive element to your site is hands down the best way to make your website stickier than a tube of superglue. Interactive tools that require no maintenance on your part are better still because you set it up once and can forget that it's there (but your visitors wont forget)! Imagine the repeat traffic from visitors who bookmark your site and use your tools again and again. Not to mention that webmaster tools make great linkbait for sites like Digg, forum sigs and other viral traffic builders! These tools won't just increase your traffic, they can increase your income as well! Integrate these scripts in to your site, add some ads above and below the scripts to promote your own list, products, adsense ads, or affiliate products to a loyal repeat audience.

[YES] May sell master resell rights
[YES] May be offered as a bonus
[YES] May be added to paid membership sites
[YES] May be packaged
[YES] May be given away free
[NO] May sell private label rights
[NO] Sell the individual products at any online auctions