I've been designing, building and managing APIs for the best part of the last 10 years. In that time I've discovered a bunch of tools and sites that have been really useful. This post provides a single point of reference for these tools.
I created a fork of the open source Swagger Editor to try and make it easier to save and version OAS definitions. This project is no longer functional, however this post describes some of the technology that was used and is here for archive purposes.