Helium - Helium lets you accept payments by credit card for anything you want to sell online.
ReDigi - ReDigi is the future of digital music.
PiPer - A DIY Minecraft computer to build gadgets
Pixycart - Pixycart is another great way to sell your digital downloads: art, music, videos, photography...
Pennywise - Cross-platform application to open any website or media in a floating window
Sellfy - Sellfy is an easy to use but powerful e-commerce platform where you can sell digital, print on demand or subscription products. Use a Sellfy storefront to create a beautiful online store or embed a Sellfy shopping cart to your own website.