There are many vital DITA resources online, including the Yahoo! dita-users group and the DITA-OT project website at dita-ot.org.

DITA-OT project website at dita-ot.org

The DITA-OT project website at dita-ot.org provides information about the latest toolkit releases, including download links, release notes, and documentation for recent DITA-OT versions.

DITA-OT project archive at dita.xml.org

The DITA-OT project archive at dita.xml.org provides news about earlier toolkit releases, and release notes for all past releases.

Yahoo! dita-users group

The original DITA list-serv is a vital resource for the DITA community. People post regularly, both asking for and offering help. While the archived messages can be difficult to search, this is a treasure trove of information.

DITA-OT Users Google Group

General interest DITA-OT product forum, for questions on any aspect of the toolkit - from installation and getting started to questions about specific overrides, plug-ins, and customizations.

DITA-OT Development Google Group

Forum for discussion related to DITA-OT development and design. Topics in this forum are more technical in nature, covering upcoming design or code changes.

Home page for the OASIS DITA Technical Committee

The OASIS DITA Technical Committee develops the DITA standard.