Script collections
https://github.com/pchiorean/Indentz
Release All Anchored Objects
https://github.com/InDesign-Scripts/releaseAnchoredObjects
Automating character style application
see What Scripts are included in Style Prep
Optimize links
https://zevrix.com/linkoptimizer/ Another paid option, and arguably not as important given PDFs can have export settings to them that do this for you. But might be useful!
Web Prep
https://www.marspremedia.com/software/indesign/web-prep Prepares document for ebooks or HTML