I imagine many people have been confused with the differences between all the myriad open source licenses available. I did a quick Google, and found a very nice basic table listing some of the more popular licenses you might encounter and their key points.
Check out the comparison here, thanks to the KDE project.
The Open Source Initiative also includes a large index of licenses here, albeit comparison is left up to you.
Handy, thanks for sharing
QPL does not look like an “Open” source license