Ex Libris App Center
Spine labels on Zebra printers
A PHP solution that enables staff not only to print spine labels on demand, but also to print labels for recently inventoried items automatically on Zebra printers.
The print process can either be executed automatically using a Linux cronjob or manually via a web frontend.
The application can be customized for other printer types.
See this blog post for details.
The application is available on GitHub.