Tip for Evergreen (or any RSS reader) users:
For non-Mac-App-Store apps that do in-app updates, you can often find the RSS URL of the updates feed and then subscribe in Evergreen.
(These feeds are often called appcasts.)
Select the app in the Finder, ctrl-click and do Show Package Contents, then open Contents/Info.plist in a text editor or in Xcode.
Then find SUFeedURL. If it’s there, then copy the feed URL and add it in Evergreen.
Example: the feed for the Mac Micro.blog app is s3.amazonaws.com/micro.blo…
Evergreen’s appcast URL is ranchero.com/downloads…