When I started building my Accidental Terrorist Missionary Name Tag Creator, I knew I wanted to use the Perl interface to ImageMagick to overlay a name in bold white text onto the blank space on a name tag image like this one:
What's more, I wanted the name to look like it had actually been drilled out or stamped into the name tag, with maybe a slightly pebbled white surface to give things a nice feeling of texture.
I had used ImageMagick before for some simple applications, and I knew it was a very powerful graphics-processing package. However, it's also very arcane, without much in the way of user-friendly documentation. (Oh, there's plenty of documentation. It just helps to be fluent already in graphics-processing-ese to grok it.) Stack Overflow, to name just one forum, overflows with questions about how to do this or that with ImageMagick.