The Xposed Framework is one of the most versatile tools available for tweakers and tinkerers in the Android community. Installing the framework on a rooted device unlocks a world of possibilities for changing the behavior of system and user apps without any modifications to the app files themselves. These sorts of tweaks used to only be accessible to users on custom ROMs, but the ease and flexibility provided by Xposed caused it to very quickly gain popularity among fans of pure vanilla Android as well. There are currently hundreds of installable modules, which allow for everything ranging from YouTube background playback, to enabling Force Touch on Android, to even making several devices water resistant.
However, each new version of Android requires the developers behind Xposed to rebuild the framework in order to get it working again, which is a process that can sometimes take several months to complete. As of yet, there is currently no version of the framework that works with Marshmallow, but that is about to change soon.
In a comment on XDA, the author of the framework, rovo89, states that he has managed to get a Nexus 9 up and running with a new build of Xposed, and that he may release a public version "later this week." The build should be stable enough for everyday use, but "not all modules will work out of the box due to the usual amount of changes in AOSP," claims rovo89. Still, this will certainly be good news for Xposed fans who have been holding off on upgrading to Marshmallow before there was a compatible version available.
- XDA Forums