A new community resource, built on top of the excellent Composer and Packagist technology that's popular in today's PHP development world, has been released and provides more context about libraries and provides a "rank" for each one - PHPPackages.org.

PHPPackages.org was built to solve the following problems: [it] defines popularity rank for php packages, provide a space for discussion and [helps to] discover which packages use a specific package.

The About page has more information about the site, how they calculate the "popularity" metric, what the various icons mean and what kinds of things you can do on the site. It's a great resource, especially for those wondering who is using their packages and to discover new packages that are more widely used. It has a lot of the same information that the Packagist site contains but that little extra bit of data is quite useful.