While an official build of Xposed framework for marshmallow 6.0 is not yet available,But no worries XDA Dev Rovio built unofficial version of Xposed framework
for android marshmallow 6.0 and lollipop.You can download and install Xposed framework in your android marshmallow 6.0 from here.After installing Check out Top 10 Best xposed Modules for Android marshmallow 6.0
1.Advance Power Menu (APM+)
With this xposed module, you can add, remove and reorder item in power menu of
your device. This mode is supported by all TouchWiz, AOSP, CM13 and Xperia
ROMs.The module has an Anti Theft option which protects your phone from
thieves. It disables menu items from the lock screen and protects the
menu items with passwords.
Download: Advance Power Menu (APM+)
2.Greenify
Greenify helps you to check out all the apps which are misbehaving in
your device and put them into hibernation when not in use which in
result helps the device from lagging and eating up the battery.
Download:Greenify
3.XuiMod
Xuimod is a collection of different animation which lets you change the default system animation to custom animation of scroll bar,toasts,and many more etc.
Download: XuiMod
4.YouTube AdAway
Through YouTube Ad Away Module you can remove youtube Ads while playing online video on YouTube.
Download:YouTube AdAway
5.GravityBox
This module makes it possible to customize nearly every aspect of the OS according to the
liking of the user. Some of the features present in the framework include Pie controls from CyanogenMod, Expanded desktop, Quick Settings customization, lock screen tweaks, Google launcher tweaks and more.Since GravityBox allows for such a high level of customization, it only works with AOSP or near AOSP based ROMs.
Download:Gravity Box
6.BootManager
Using this module you can disable the app to start automatically every time
you boot your device. Just install the Xposed module and tap on the
apps you wish to exclude. The app will mark these apps as red and next
time you boot the phone, they will not be executed.hence Your device boot up time will be decreased.
7.Network Speed Indicator
Through this Xposed module You can monitor the speed of your internet or Wifi connection right above on the top of the status bar.The module will show you the upload and download speed you are getting
on the particular Wi-Fi or data network. The position, style and the
units can be configured making the experience even better.
Download:Network Speed Indicator
8.App Settings
This is a module which can change general settings to all apps at the
same time.
For example, if you would like to restrict your reading app to open in
portrait mode, with minimum brightness and mute the media volume, you
can apply all these settings using the App Settings Module and they will
be automatically applied when you launch the app.
Download: App Settings
9.Screen Filter
If you loves to reed on your Android tablet or Mobile device then this module is for you as it helps in decreasing the luminosity of your device screen which in result helps to use device in the dark without affecting your eyes.
Download:Screen Filter
10.Obb on SD
Module Obb on SD attempts to make it seamless – just enable module,
reboot and move obb’s to SD card (to same folder: Android/obb) – that’s
it. No need to enter any path or whitelist/blacklist any app. Do you
want to only move Obb from Grand Theft Auto? Then only move that obb.
Obb on SD will detect “obb on SD” and enable hooks only for this single
game.
Download:Obb on SD