ACM SIGPLAN: The ACM Special Interest Group for Programming Languages. SIGPLAN explores techniques and tools for programming language implementation, design, and use.
Compilers and Compiler Generators: Article by P.D. Terry, Rhodes University, 1996
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.
Creating A Language: Article by Fabio Fernandes for beginners.
FreeTechBooks - Compiler Design and Construction: Free online books on compiler design and construction. Subjects include concepts and tools.
Programming Language Research: A collection of information and resources for research in programming language theory, design, implementation, and related areas.
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.
Syllabus for Theory of Computation: A complete mini-course on Formal Languages and Automata