This headline is misleading taken out of context, and is not the headline of the linked blog post (I'm the author). JSMin isn't "banned software", it's just not allowed on Google Code.
Saying that JSMin is banned still implies JSmin itself ws explicitly banned, which is not correct.
It would be better to say 'non Open Source' as that's the reason why JSmin, Microsoft Windows and other apps for which you can get source code but aren't OSS aren't allowed on Google Code.
