Modula-2 - Growing article, with links to many related topics. [Wikipedia] - http://en.wikipedia.org/wiki/Modula-2
Hello, World program - Modula-2 - http://www2.latech.edu/~acm/helloworld/modual2.html
Modula-2 Online Exercises - Very good series of exercises to learn Modula-2. Exercise code is available online so that you can focus on the questions. Topics are clearly addresses in independent questions. - http://parallel.vub.ac.be/~johan/Modula-2/New2002_2003/
BNF of the Modula-2 Programming Language - The Backus Naur Form is a formal notation to describe the syntax of a given language. - http://cui.unige.ch/db-research/Enseignement/analyseinfo/Modula2/BNFindex.html
The Modula-2 Compiler System MOCKA - Modula-2 Compiler KArlsruhe is the free Modula-2 system developed by GMD research laboratory in Karlsruhe (Germany). - http://www.info.uni-karlsruhe.de/~modula/
Modula-2 FAQ - Answers to Frequently Asked Questions about Modula-2. - http://www.arjay.bc.ca/Modula-2/m2faq.html
Modula-2 Web Directory - Directory, tutorial and reference manual, free Modula-2 source code and downloads. - http://www.modula2.org/
Modula-2: A Complete Guide - book by K. N. King (Georgia State University) - http://www.knking.com/books/modula2/index.html
ISO/IEC JTC1/ SC22 / WG13 - The international standardization working group for the programming language Modula-2. - http://sc22wg13.twi.tudelft.nl/
Download The ModulaTor Technical Publication - 72 issues of The ModulaTor: Articles about the programming languages Oberon-2 and Modula-2: programming examples, implementation notes, language comparisons, and language design. - http://www.modulaware.com/mdltr_.htm
Practicum Structured Programming: Modula-2 - Exercises, tips, syntax reference, programs written in Modula-2. Free University of Brussels. - http://parallel.vub.ac.be/education/modula2/