Rolled-labels for direct thermal printing with Zebra Technology’s desktop printers and open source software provide a flexible and inexpensive solution for people having to do order fulfillment on a small scale. This page list a few open source libraries for sending data to Zebra Technology printers to set your workflow up with a script or small webapp.
From the blog post:
Lots more people are having to do this kind of work for themselves these days, Ecommerce keeps growing, with makers, entrepreneurs, and small businesses working through crowd funding or online marketplaces, like Kickstarter or Etsy. Sometimes, the right solution is to let someone else handle it for you—but not always, and even if you do, there’s good chance you will still have to fill some orders yourself.