One of the most important channels for Ada knowledge is the usenet group comp.lang.ada. It can be found at groups.google.com. If you have any questions about Ada, this is the place to ask them.

The official IRC channel for Ada is the #ada channel on irc.freenode.net

The Ada group at identi.ca is also a good place for information and news about Ada.

The Ada sub-reddit is a very nice place for finding news and general resources about Ada programming.

There's quite a few solid Ada related websites out there. Here's a few of them:

• Ada Reference Manual (ARM)
• Ada Specific Search Engine
• dmoz Ada listing
• Ada 95: The Craft of Object-Oriented Programming
• Ada 95 Tutorial
• The adacommons.org Wiki
• The Ada Wikibook
• Jacob Sparres guide to Unix/Linux Ada Programming
• Stephane Carrez Java 2 Ada blog
• AdaPower, Ada tools and resources
• Ada FAQ
• The Lovelace Ada Tutorial
• The Big Online Book of Ada Linux Programming
• Rosetta Code, Solving programming tasks in Ada
• Ada Notes
• A general Ada website with tools, a blog aggregate and Git hosting for Ada projects
• functionx.com Ada Programming Fundamentals
• libre.adacore.com - The GNAT compiler and various libraries
• Thomas Løcke's blog about Ada programming
• A collection of Ada related RSS feeds
• Huge collection of Ada tools at the adaic.org website