Elego Software Solutions GmbH: Hosts the full Modula-3 CVS source code repositories from: Critical Mass, Inc., compiler and development system; and PM3, of the Ecole Polytechnique, Montreal.
m3gtk: Modula-3 binding to GTK Toolkit.
Modula-3: Growing article, with links to many related topics. [Wikipedia]
Modula-3 FAQ: Modula-3 Frequently asked questions and answers.
Modula-3 Reference and Tutorial: A reference and tutorial on the Modula-3 language and programming system.
Modula-3 Resources Page: Modula-3 related links.
Object-Oriented Language: Modula-3: Offers a listing of mailing lists, resources, archives, links to FAQs, and past conferences.
Persistent Modula-3: An extension of the Modula-3 programming language that supports orthogonal persistence and transactions.