C language:

            C Library Reference Guide


       C language tutorial


            Programming in C Notes


       Animated basic C tutorial




gdb tutorial


gdb for the unix newbie


       dbx tutorial




Java Language Specification




       Unix Tutorial for Beginners (U. Alberta)

       Cal Tech Big Unix Tutorial

       A Unix Course at Ohio State University

       U Texas Unix help


       Emacs User's Guide (U. Southern Maine)


    lex/flex tutorials:

        creating a lex scanner

   Lex - a text scanner (lots of useful information here, with examples for makefiles)
   flex (a scanner generator) tutorial
   lex and yacc FAQ

JLex: A Lexical Analyzer for Java

Webpage Design
  Tips for writing webpage content backed by research

Research-based Web Design & Usability Guidelines