- 02/12/2010 – Alpha 1
- 03/02/2011 – Alpha 2
- 03/03/2011 – Alpha 3
- 31/03/2011 – Beta
- 21/04/2011 – Release Candidate
- 28/04/2011 – Version final de Ubuntu 11.04 "Natty Narwhal"
Kate Stewart has announced the availability of the first alpha release of Ubuntu 11.04, code name "Natty Narwhal": "Natty Narwhal is doing a first bit of spy hopping, also known as alpha 1, which will in time become Ubuntu 11.04." New features include Unity as the default user interface: "Unity is now the default in the Ubuntu desktop session. The Unity Launcher is now available; it can be used to launch applications that are pinned to the launcher and switch between running applications. It supports quick lists on context menu. It can be set to auto-hide. Places is not yet available in alpha 1. Clicking the Ubuntu logo in the upper left of the screen will open the applications directory."
Read the release announcement and release notes for further details.
Download (SHA256): natty-desktop-i386.iso (717MB, torrent), natty-desktop-amd64.iso (723MB, torrent). Also available are the first 11.04 alpha builds for Kubuntu (download, announcement), Xubuntu (download), Edubuntu (download, release notes) and Ubuntu Studio (download).