Goodshop.com 

Goodshop partners with thousands of top retailers and so far, has been able to donate more than $13 million across thousands of causes. Be sure to designate harmony House for Cats as your charity when you register. Click here to join. (www.goodshop.com)  

Not only do Goodshop merchants donate with virtually every purchase, but they also provide supporters with coupon codes to save while they shop. Participating merchants include Gap, Walmart, Lands’ End, Home Depot, Travelocity, Bed Bath & Beyond, Kohls, Staples and many more!