In the same vein as my post on where you can find many of the samples from the legacy DirectX SDK, where you can find all the various replacements for D3DX, and the status of various DirectX components; this post is a catalog of where you can find the latest version of various tools that shipped with the legacy DirectX SDK. Lacking that, it at least provides a status or alternative for the tool.
|DirectX Capabilities Viewer (
||Windows 8.1 SDK / Visual Studio 2013 or later|
|DirectX Error Lookup Tool (
||The Visual Studio Error Lookup (under Tools) should help with many HRESULT values, particularly for development on Windows 8.x or later.
For notes on the DxErr library that the
|Game Definition File Validator (
||MSDN Code Gallery or GitHub|
|Texture Conversion Tool (
||DirectXMesh See also the Samples Content Exporter.|
|DirectX Texture Editor (
||This legacy DirectX SDK tool does not support DDS files with the 'DX10' header extension. VS 2012 or later can view all DDS files supported by DirectXTex.|
||Windows 8.1 WIC supports DDS format files for BC1-BC3/DXT1-5 so these show up as thumbnails and can be opened with Photo Viewer.|
||XACT is deprecated and is only available in the legacy DirectX SDK.
||xWMA compression is supported by XAudio 2.7 and the Xbox One version of XAudio, but not by XAudio 2.8 in Windows 8.x. Therefore this tool only ships in the legacy DirectX SDK and in the Xbox One XDK.|
|Microsoft XNA Test Case Tool|
|PIX for Windows||PIX for Windows is not compatible with the DirectX 11.1 or later runtime on Windows 8.x or Windows 7 SP1 with KB2670838. See this post for details. Visual Studio Graphics Diagnostics in VS 2012 Pro+, VS 2013 Express for Windows, VS 2013 Pro+, or VS 2013 Community. Graphics vendor tools from Intel (GPA), AMD (GPU PerfStudio), or NVidia (Nsight).|