Building Showbooth would have been a lot harder if it didn't use projects of other people. A big thank you for all credited here.
Showbooth Go uses the following 3rd party software:
The tutorial videos features some of the work credited below in "Sample Slideshow" section.
The sample slideshow is public domain, but keep in mind that photos and/or videos included in the slideshow have a their own CC-BY or CC-BY-SA license. Here are the attributions/credits: