ReDigi - ReDigi is the future of digital music.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Pixycart - Pixycart is another great way to sell your digital downloads: art, music, videos, photography...
PiPer - A DIY Minecraft computer to build gadgets
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.
Helium - Helium lets you accept payments by credit card for anything you want to sell online.