3 years ago, I wrote a post where I listed some of the Insider Programs at Microsoft.
This was on 2016 November, and I added in the list Windows Insider, Office Insider, Visual Studio Insider, the almost dead Skype Insider and more.
Now thanks to Scott Hanselman (@shanselman) I found an official resource with all the Insider Programs at Microsoft.
Up to today, we can find Bing, Edge, Office, Skype (still!), Visual Studio, Visual Studio Code, Windows and Xbox. Super cool!
Greetings @ Burlington