When researching ActionScript libraries to include in a project, it is tempting to simply look to see that it has an open-source license and just use it. However closer reading may often reveal that the license burdens the developer with responsibilities which may make use of the code irreconcilable with the project requirements. Grant Skinner has published a valuable plain English summary and comparison of the common source code licenses. My take from it, is that if the source you are hoping to use is published with any license other than MIT, chances are you are not going to like some of the license conditions and you certainly need to research them.
understanding source code licensing
