Homepage: http://users.xfce.org/~benny/projects/xfce4-dev-tools/
These tools provide the xdt-csource executable which is required to build the music player Pragha which I want to package for Solus.
It is open-source under the GPL-2.0 license.
This is the current tarball:
https://archive.xfce.org/src/xfce/xfce4-dev-tools/4.15/xfce4-dev-tools-4.15.0.tar.bz2 (sha256 e3109849f2db8609dd80b3a1273f658afef60cb46c506d1e044a264acc5a4dbc)