For those looking for the Windows 10 Assessment and Deployment Kit (ADK a.k.a. Windows 10 ADK) it’s available here:
Download kits and tools for Windows 10
Way at the bottom, you will see:
”Learn about what's new in the Windows ADK for Windows 10”
“Download the Windows ADK for Windows 10”
Click on "Download the Windows ADK for Windows 10"
Note: The Windows Performance Toolkit (WPT better known as WPRUI/WPR/Xperf) that ships with Windows 10 ADK/SDK is not compatible with Windows 7 SP1 or Windows Server 2008 R2 SP1. The stack (module!function) will show up as ???!???. Use the Windows 8.1 ADK/SDK instead.