Komposta cmf is using a a lot of third party libraries except lithium one of them is HTML Purifier. It is used to ensure security in pages and comments. Komposta has an extended configuration page to setup multiple profiles and you can absolutely play with all the settings from purifier for 100% control. In my last post i embedded a youtube video and it only took me 45 minutes to setup the pages profile lol.
There are a lot of applications out there relying on html purifier but with limited configuration. I like configuration ;p
Updated Screenshots 2012/11/16