Compilers

Excelsior, LLC: Products
XDS products: Modula-2 and Oberon-2 compilers, cross-compilers for OS/2, Unix, Windows.
http://www.excelsior-usa.com/products.html

Excelsior Native XDS-x86
Optimizing ISO Modula-2 and Oberon-2 compiler for x86 platforms, allows intermixed dual code. Free download of Personal Edition for private, non-commercial use, for Linux, Windows. Other uses need license purchase. [commercial]
http://www.excelsior-usa.com/xdsx86.html

Free Modula-2 Compilers
List of free Modula-2 compilers for various operating systems including Windows, Linux, FreeBSD, Sparc, MSDOS, Atari ST, IRIX, Macintosh.
http://www.thefreecountry.com/compilers/modula2.shtml

Gardens Point Modula (GPM) Compiler
GPM compiler family began as a project to make Modula-2 available in a consistent implementation on contemporary machines. It has become a flexible platform for research in compiler technology and associated areas. Projects, papers, news.
http://plas.fit.qut.edu.au/gpm/

GNU Modula-2 and M2F
Home of GNU Modula-2 (GCC integrated multitarget compiler), and M2F (full x86 compiler, obeys Wirth's 2nd Edition Programming in Modula-2). GNU Modula-2 still in development. Papers, course notes, downloads. [Open Source, GPL]
http://floppsie.comp.glam.ac.uk/

Mide3de2
Windows IDE for FST Modula-2 compiler, many features: multi document support, syntax highlight, search-replace, library and imported function browsing, multi-undo/redo. [Open Source, GPL]
http://mide3de2.sourceforge.net/

ModulAware.com
Firm specializes in 32- and 64-bit native code Modula-2 and Oberon-2 compiler development, support, international distribution, for Compaq OpenVMS Alpha and VAX, x86 PCs with Linux, OS/2, Windows 95/98/NT/2000. Trial version downloads, data sheets, 64 bit implementation notes, The ModulAtor.
http://www.modulaware.com/

Ulm's Modula-2 System
A Modula-2 compiler for SPARC- or 68K-based Sun workstations available under the terms of the GNU GPL
http://www.mathematik.uni-ulm.de/modula/