SIGAda
- ACM Special Interest Group on Ada: information on SIGAda organization and pointers to current information and resources for the Ada programming language.
Ada World - Tries to promote the Ada programming language, as well as being a good reference site to learn from and a place to see current Ada projects.
AdaBasis - A repository of (mostly) free Ada Software.
AdaIC - The Ada Information Clearinghouse provides information and resources on Ada.
Dirk's Pointers to Ada Related Information - In case you are wondering why people are interested to use Ada as a teaching language, even as the language of choice for a first programming course at universities.