Unity is a desktop and netbook environment developed by Canonical, the company behind Ubuntu. Unity will be the desktop environment you will use in Ubuntu 11.04 if you use the default installation.
Fedora and openSUSE, two competing Linux distributions, has spent a lot of time and effort trying to get Unity to be included as an option even with them. But according to Fedora and openSUSE it is still too buggy, so they have both decided to stop the project.
Aimed at developers, Bash brings a complete Linux command line to Windows, but only the command line.
Yes, that is correct, as per industry sources, Canonical - the company behind the popular Ubuntu Linux distribution and Microsoft have partnered up to integrate Ubuntu into Windows 10.