There are some good tools for batch image processing. But they're all about pixels. And I don't like raster graphics when it comes to print media. So I decided to create a one-purpose tool for creating print-ready event badges.
At noprobLAN we therefore create badges from PDF templates with this Java application. The application consists of two console applications and a GUI which combines them. It's possible to create badges and save them to a PDF all merged onto A4 pages.
Custom configuration like editing the output format, scaling, offsets, etc. has to be done in code for now.
Does not work on MAC OS X because of a bug in Oracles java.