Reverse PDF Page Order
I created an app that allows you to upload a pdf and it returns a copy of your PDF with the page order reversed. The code is here: https://github.com/pawl/pdfreverse
Initially when I googled how to do this in Adobe Acrobat, the first few results had fairly complicated solutions. After I made the app, I ended up finding an easier way to do it in Adobe (in the 6th from the top Google result on “reverse pdf order acrobat”…):
Oh well, it was a fun project.