Stable

• FeistyFawn (7.04; Released April 19, 2007)

• EdgyEft (6.10; Released October 26, 2006)

• DapperDrake (6.06 LTS; Released June 1, 2006)

End of Life (EOL)

Ubuntu releases are supported for 18 months. Ubuntu LTS (Long Term Support) releases are supported for 3 years on the desktop, and 5 years on the server.

• BreezyBadger (5.10; Released October 13, 2005; EOL April 13, 2007)

  • [https://lists.ubuntu.com/archives/ubuntu-security-announce/2007-March/000504.html]

• HoaryHedgehog (5.04; Released April 8, 2005; EOL October 31, 2006)

  • [https://lists.ubuntu.com/archives/ubuntu-security-announce/2006-October/000418.html]

• WartyWarthog (4.10; Released October 20, 2004; EOL April 30, 2006)

  • [https://lists.ubuntu.com/archives/ubuntu-announce/2006-March/000061.html]

Future Release

• GutsyGibbon (7.10; Planned for October 2007)

• HardyHeron (8.04 LTS; Planned for April 2008)

Release Schedule

Ubuntu releases every six months, one month after each Gnome release (see TimeBasedReleases)

Variants of Ubuntu

• ["Kubuntu"] (Ubuntu with KDE instead of Gnome)
• ["Edubuntu"] (Ubuntu focused on education)
• ["Xubuntu"] (Ubuntu with XFCE instead of Gnome)

And perhaps in the future:

• GrumpyGroundhog (an Ubuntu-derived distribution containing a "crack-of-the-day" set of packages)