xray_re-tools
fork http://xray.codeplex.com/
X-Ray unofficial toolset for complex use with official S.T.A.L.K.E.R. MOD SDK. The code to load/save X-Ray files closely follows the GSC one. Regarding the rest source code, you can do whatever you want, just do not say you wrote it.
Binaries
And see Release section.
Visual C++ Redistributable for Visual Studio 2015 is required to run programs.