Tool to check latest software releases from upstream?

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http://unix.stackexchange.com – Does anyone know of a program/framework to list/check latest software releases from upstream? For example for wordpress, apache/nginx, and so on. The program should just retrieve respective software project's webpage (or FTP listing, whatever) and parses it to grab the version numbers and tarball URLs. There is a related question: Keeping track of the latest releases , and I'm checking out debian/watch right now, but this requires downloading the package source. And it also means I have to wait until a Debian maintainer uploads a new version, which can be a while. I'd prefer something more li (HowTos)