I've been developing an eBay listing software. I want to improve it to become a useful tool for small to medium sized eBay sellers. Currently, it has just basic features:

• Manage listings, orders and messages of multiple eBay accounts.
• Flexible list filter and layout.
• Mobile optimized.
• Simple user interface. Low learning curve.
• Works on browsers. Also installable as a standalone application.
• No application banner in your item description.