We just packaged darktable 1.4rc1 for more testing before releasing 1.4 proper in a few weeks. We’ve got tarballs,
https://sourceforge.net/projects/darktable/files/darktable/1.4/darktable-1.4~rc1.tar.xz/download
debian packages,
https://packages.debian.org/experimental/darktable
a Macintosh DMG, …