Software update notification service?

Question

Programming

Recently I came across a good example of such a service for Ruby gems: gemnasium.com/.
The bottom line is that when logging in via GitHub, the service imports a list of gems developed by the user, collects a list of dependencies, and starts sending notifications if dependencies are updated.
But I initially wanted these to be not notifications about updating the dependencies of my projects, but also about the release of new versions of completely arbitrary projects. And there would be no dependence on the development language, i.e. one could follow any repositories, say by their list of tags/branches.
This would be useful, for example, if you need to build custom RPM/Deb packages with your own patches - you don't need to constantly monitor upstream updates.
Nobody met similar? If not, I think I will do for myself and those who wish.

Answer 1

what are the target platforms?
With the advent of stores in Win & Mac, all software will gradually be distributed only through them, and there will be their own mechanism for notifying about updates.