http://www.riscosdev.com is the homepage for RiscOS Developments. An operating system that will run beautifully on a Raspberry Pi (I have one and I love it!)

I use one of the base programs called !Draw to design my blanket patterns.

You can download RiscOS Direct for a Raspberry Pi on the website and get started using RiscOS almost immediately. There is a series of help videos by WifiSheep on YouTube.