An improved HUD has been added which works even with GNOME apps (such as Nautilus and GNOME Builder). It can work with multiple apps at the same time.
The Unity7-style notifications (
notify-osd) have been added to UnityX.
All the launched apps now open up in
~/Desktop instead of
GitLab repositories: https://gitlab.com/ubuntu-unity/unity-x
You may need to open up the Settings app to set the wallpaper in UnityX.