In addition to what thwarted posted, Black Duck is a great resource for analysis of open source software as they have a database drawn from all over the place:

In addition to what thwarted posted, Black Duck is a great resource for analysis of open source software as they have a database drawn from all over the place: http://www.blackducksoftware.com/resources/data http://www.blackducksoftware.com/resources/data If you summarize for GPL/LGPL and what projects are compatible, it winds up being about 45% of projects GPL/LGPL and up to 87% or more of all open source projects are compatible with the license. I go over it in a handy chart here: http://johnhaller.com/useful-stuff/open-source-license-popularity http://johnhaller.com/useful-stuff/open-source-license-popul... As thwarted said, it can be problematic looking at 'projects' as something like bootstrap on github, which is MIT licensed, has over 24,000 forks. Now, most of those are nonsense and have no changes (or at least nothing useful) but do you count that as 24,000 projects?