Yet another auction site called Etsy seem to be growing up rapidly. Are there any listing software or selling management tool for Etsy seller? And which is the best Etsy listing software?

Etsy has a developer support site and provides their application programming interface(API).

Do eBay sellers want to sell their items on Etsy? But Etsy is an auction site for “Handmade items”, so sellers don’t list many items at once like on eBay.

Should I implement Etsy support feature on my eBay listing software?