BeatStore - BeatStore is an eCommerce solution for music producers to license and sell their instrumentals.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Shoprocket - Add eCommerce to your existing website in 5 minutes.
Helium - Helium lets you accept payments by credit card for anything you want to sell online.
EthosPay - EthosPay provides merchant processing services for low and high risk merchants.
X-Mouse Button Control - XMouse Button Control (XMBC) allows you to create application and window specific profiles.