Wholesale Gorilla

I've been using this app for 3 or 4 months now and I love it. It's easy to use, and the support is fantastic. I sell at a lot of conferences- mostly B2C but with frequent B2B enquiries and it's so good to be able to direct people to the website to create a wholesale account.
The developers even went out of their way to help me hide a customer facing multi-buy table (from another app) from my wholesale customers.
Highly recommended.