You might got an email that Sibbell.com will be shutdown and you are looking for alternative (like I did).
Here is a list of the alternative services (in the order of my preference):
If you list is “small”, and you use atom reader to keep you up to date, than you could also subscribe to each projects
by adding /releases.atom to the project URL. e.g.
https://github.com/nodejs/node/releases.atom - to subscribe for NodeJS release updates.
Another way to keep track of the releases is by using Releases. With Releases You can check at any time the latest release version/notes of your Github starred repositories.