There are a few Ubuntu remixes out there, but one of the notable ones is UMix. It makes use of the Unity desktop instead of Gnome. Here is our UMix review.
If you are nostalgic or dislike Gnome and want Unity desktop back on Ubuntu, it’s easy to install Unity and make it your default graphical shell again.
Unsettings is a graphical tool to easily tweak Unity Desktop environment and its settings. For example: those related to launcher, dash, windows, and more.
Unity Tweak Tool is a configuration tool for the Ubuntu Unity Desktop. It brings all the settings together in a single place so you can access them easily.