For pricing and inventory, I created an Excel spreadsheet which I use for each item I make. It has evolved over the past year. Info on it includes cost of goods sold; labor and profit charge; and a general expense charge. For inventory, I track when the item sold; for how much and how many; how many items I made, pre-cut and materials available.
I also have a design/planning sheet I use to help keep me within my budget and purchase supplies needed. (In a fabric shop, I'm like a kid in a candy store and so I need something to restrain myself!!)
For shipping, I print 2 copies of the receipt, one for the customer and one for my records. On the back of my copy, is the shipping info.
For all other info, I download data from PayPal and Etsy into a spreadsheet. I "hide" the data fields I don't need, then save and print when needed.
I'm presently looking at Quick books for accounting and tax purposes. I plan to close my Outright account in a few days b/c I don't want to pay fees and more important I just want more control of where the data resides.