Ask HN: Software Update RSS - does this exist?

There are about 50-100 applications, libraries, gems and other software packages that I'm interested in. I'd like to receive updates through RSS whenever a new version of one of these packages is released, including release notes if available. Optionally I'd like to filter out minor updates/bugfixes for specific packages.

Does something like this exist? For music there's Muspy, but I'm not aware of a solution for software.