npm, the Node.js package manager, has changed license  from a
modified version of the MIT  to the Artistic 2.0  license
effective with version 1.3.6. This version is now in Rawhide and
queued for updates-testing in Fedora 19 and 18 as well as EPEL 6.
Fedora Legal believes both licenses to be GPL-compatible so this
shouldn't cause anyone trouble. On the contrary, using a standard
license instead of a custom-written one should only make peoples'
lives easier. ;-)