ACM SIGPLAN
   The ACM Special Interest Group for Programming Languages. SIGPLAN explores techniques and tools for programming language implementation, design, and use.
   http://www.acm.org/sigs/sigplan/

Basics of Compiler Design
   Freely available book written for use in the introductory compiler course at DIKU, the department of computer science at the University of Copenhagen, Denmark. (Torben Mogensen)
   http://www.diku.dk/hjemmesider/ansatte/torbenm/Basics/

Compilers Construction
   Notes on compiler theory, the source code of describing actual construction of compiler in C programming language. Also compiler construction related links to books, notes, tutorials, and news groups.
   http://www.personal.kent.edu/~rmuhamma/Compilers/compiler.html

Compilers and Compiler Generators
   Article by P.D. Terry, Rhodes University, 1996
   http://scifac.ru.ac.za/compilers/

Creating A Language
   Article by Fabio Fernandes for beginners.
   http://home10.inet.tele.dk/moelhave/tutors/misc/createlanguage.htm

FreeTechBooks - Compiler Design and Construction
   Free online books on compiler design and construction. Subjects include concepts and tools.
   http://www.freetechbooks.com/viewforum.php?f=14

Programming Language Research
   A collection of information and resources for research in programming language theory, design, implementation, and related areas.
   http://www.cs.cmu.edu/afs/cs.cmu.edu/user/mleone/web/language-research.html

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

Syllabus for Theory of Computation
   A complete mini-course on Formal Languages and Automata
   http://www.seas.upenn.edu/~cit596/notes/dave/syllabus.html