Compilers

Zngr L - Compiler of the theoretical language L, which is used as a simple language for teaching computation theory.
http://zngr.atspace.com/menu/zngrlcompiler.html

The Compiler Connection - A listing of compiler companies, compiler research projects, benchmarks, and compiler job listings.
http://www.compilerconnection.com/

Programming Language and Compiler Research Groups - Multi-site working groups and projects listing.
http://www.cs.cmu.edu/afs/cs.cmu.edu/user/mleone/web/language/projects.html

Bloodshed Software: Compilers Resources - Links to free compilers, with sources, compiler construction toolkits, tutorials, articles, other compiler-related sites.
http://www.bloodshed.net/compilers/

Tools for compiling - LL(1) parser generator, implentations of Euler, and Backus' FP, all written in Icon.
http://www.iit.edu/~tc/toolsfor.htm

Dmitry Smaghin - A collection of educational compilers, assemblers, disassemblers, interpreters with sources (C, Pascal). Links to freeware compilers. [English, Russian]
http://www.exmortis.narod.ru/

Catalog of Free Compilers and Interpreters - Searchable listing of programming language tools that come with source code.
http://www.idiom.com/free-compilers/

SIGPLAN: Programming Languages - ACM special interest group that explores the implementation and efficient use of programming languages.
http://www.sigplan.org/

Links and Selected Readings for Compiler Writers - GCC extending specific literature, processor chips documentation, collected papers/sites on language standards, compilers, optimization.
http://gcc.gnu.org/readings.html

Free Programming Compilers and Interpreters - Links to free programming compilers and interpreters categorized by language.
http://www.freeprogrammingresources.com/frcomplr.html

Compilers.net - Directory, search engine of compiler-related sites. People, books, papers, publishers, decompiling, generators (scanner, parser, backend), translators, compiler compilers, courses, tutorials, library, FAQ, free, companies, tools, mail list, survey/poll.
http://www.compilers.net/

Researchers in Programming Languages and Compilers - A list of home pages for researchers working on programming language theory, design, implementation, and related areas. Maintained by Mark Leone at CMU.
http://www.cs.cmu.edu/afs/cs.cmu.edu/user/mleone/web/language-people.html

Compiler Jobs - Compiler job openings at companies and universities.
http://www.compilerjobs.com/

Turbo Pascal 3.0 compiler and code generation internals - Internals of one-pass compiler by example Pascal compiler.
http://www.pcengines.ch/tp3.htm

Softpanorama Bookshelf / Compiler Construction - Reviews of compiler books, with links to Amazon just in case you want to buy one
http://www.softpanorama.org/Bookshelf/compilers.shtml

Context - Simple programming language and compiler, with sources on its own input language; DOS, Win32 versions. Some information on compiler design. By Andrei V. Khokhlov.
http://www.avhohlov.narod.ru/engl010.htm

The comp.compilers Newsgroup - Home page of newsgroup. Searchable full archive of messages from 1986, file archive, RSS feed.
http://compilers.iecc.com/

Free Compilers and Interpreters - List of free compilers and interpreters for programming languages with descriptions.
http://www.thefreecountry.com/compilers/

Architectural Neutral Distribution Format (ANDF) - A software porting technology, intended to help develop shrink-wrapped software for open systems, independent of any particular processor architecture.
http://www.info.uni-karlsruhe.de/~andf/index.htm