Xposed Framework is known as the golden ticket of customization on Android! This allows you to have pretty much every customization available for rom users without actually having to install a rom to your device. All you need for Xposed to work on your phone is root! Just a few weeks ago Xposed was released for Marshmallow. The release came with a few bugs including a nasty bug that was causing some bootloops.
Yesterday version 79 was released which fixes the majority of bootloops on most devices running Android 6.0.1 marshmallow. Developers are now working towards making Xposed "systemless" in the same way that Chainfire has made root systemless for Marshmallow. This may take some time and will obviously take much effort from those working on it. It will be no lite task. Head to the link below for the version 79 download.
via XDA