On of the things that I spend my time on is custom Adobe InDesign script development. Over the years, customers have come to me with some very interesting workflow and automation challenges that I've been able to solve by writing a script.
But I've also written a few scripts that I give away free in the hope that someone will find them useful. These scripts are all listed and described here. These include scripts for checking documents for flipped images, automating the Package process, playing each page of your InDesign file as a slideshow, transposing characters, and more. Check them out!