Microsoft Toolkit - Official KMS Solution for Microsoft Products
This is a set of tools and functions for managing licensing, deploying, and activating Microsoft Office and Windows. All output from these functions is displayed in the Information Console. All functions are run in the background and the GUI is disabled to prevent running multiple functions, as they could conflict or cause damage if run concurrently. The Microsoft Office Setup Customization Functions (Customize Setup Tab), AutoKMS Uninstaller (if AutoKMS is installed), AutoRearm Uninstaller (if AutoRearm is installed), Office Uninstaller and Product Key Checker work even if Microsoft Office or Windows is not installed/supported. For information about individual functions, see the program readme.

Requirements:
Microsoft .NET Framework 4.0 or 4.5 (Not 3.5)
Microsoft Office 2010 or Later for Office Toolkit Support 
Windows Vista or Later for Windows Toolkit Support

Microsoft Toolkit Changelog: 

2.5.2
-Added Label to show Microsoft Office Setup Version and Architecture on Customize Setup tab.
-Added more checks to Add Languages and do better filtering of Language Packs.
-AutoKMS no longer attempts activation/displays error when there are no KMS keys installed.
-AutoKMS skips running if a BSOD occurred within 30 minutes of the last Scheduled Task run.
-Fixed Customize Setup failing if file extensions were not lowercase.
-Scheduled Tasks now retain their last run date.
-Updated TAP Driver.

Credits:
-Bosh for the original GUI Design and co-development of Office Toolkit
-ZWT for the original KMSEmulator
-letsgoawayhell, Phazor, nosferati87, and mikmik38 for KMSEmulator fixes and improvements
-MasterDisaster, FreeStyler, Daz, nononsense, and janek2012 for work on Key Checker