System Software Group
This group at the university of Linz offers lots of public domain packages for the Oberon System V4, as well as they continue to maintain this Oberon System variant.
http://www.ssw.uni-linz.ac.at/

Oberon Webring
Webring related to Oberon programming language or system environment.
http://www.factorial.com/hosted/webrings/oberon/

Cetus Links: Oberon
Many links about Oberon, Oberon-, and Component Pascal.
http://www.cetus-links.org/oo_oberon.html

Oberon Microsystems, Inc.
Leading component-based software architecture firm: architecture consulting, software products, custom development, education. Prof. Niklaus Wirth of ETH Zürich is board member.
http://www.oberon.ch/

Hello, World program
simple example Oberon program.
http://www2.latech.edu/~acm/helloworld/oberon.html

The Alignment Trap
Oberon (Oberon-2 focus) information, compiler and system implementation table, AlphaOberon-2 compiler user guide (64-bit, for HP OpenVMS Alpha), comparisons, downloads, links.
http://www.zel.org/oberon/

Oberon Page for Small Linux
Beginners Oberon Page, with examples, sample code, tutorials and links.
http://www.superant.com/smalllinux/oberon/index.html

VisualOberon
Very nice GUI library for Optimizing Oberon Compiler (OOC) to make platform independent graphic programs using set of standard and advanced controls, advanced layout engine. Runs on all Unix systems with X Window. [Open Source, LGPL]
http://visualoberon.sourceforge.net/

Linz University Oberon Research Projects
The Oberon System (V4) links at Linz University.
http://oberon.ssw.uni-linz.ac.at/Research/Projects/Oberon.html

Ulm's Oberon System
Good general reference site for Oberon links.
http://www.mathematik.uni-ulm.de/oberon/index.html

Oberon
Programming language information, links at Heidelberg University: learning, main implementation families, literature, mirrors, other sites.
http://www.statlab.uni-heidelberg.de/projects/oberon/

Oberon Code-Samples DataBase
A list of Oberon source code examples
http://www.oberon.ethz.ch/cdb/index.html

Native Oberon Operating System
Original language designed by Niklaus Wirth, based on ETH Oberon; runs on platforms: Intel x86 compatible PCs (standalone, Linux, Windows), SharkOberon for DEC Shark Network Computers.
http://www.oberon.ethz.ch/native/

Oberon/F Introduction
Developer information for Oberon/F for the Apple Macintosh.
http://www.mactech.com/articles/mactech/Vol.13/13.03/OberonIntroduction/index.html

Oberon Programming Language
Growing article, with links to many related topics. [Wikipedia]
http://en.wikipedia.org/wiki/Oberon_programming_language