The Awk Programming Language - Pattern scanning and processing language, well suited to small projects involving text processing or formatting, with some useful features for small database applications. Its pattern description features are derived from the grep family of standard Unix - http://infohost.nmt.edu/tcc/help/lang/awk.html
Geeks that Gawk - A forum for GNU Awk questions and discussions at Yahoo Clubs. - http://tech.groups.yahoo.com/group/geeksthatgawk/
GAWK Unix Man Page - Brief description and many options. - http://bama.ua.edu/cgi-bin/man-cgi?gawk
Jack's AWKGUI - Simple HTA GUI for AWK; for Windows PCs, save useful scripts, helps make regular expressions, supports IIS log files, tests scripts; description, screenshot, download. - http://jackparke.googlepages.com/awkgui
AWK Programming Language - Growing article, with links to many related topics. [Wikipedia] - http://en.wikipedia.org/wiki/AWK_(programming_language)
Effective AWK Programming - A User's Guide for GNU Awk by Arnold D. Robbins. - http://www.dc.turkuamk.fi/docs/gnu/awk/gawk_toc.html
Awk Reference - Quick reference with some simple examples. - http://linux.frugal.org/ref/awk.html
Gawk - Official homepage at GNU site. - http://www.gnu.org/software/gawk/
The AWK Programming Language - by Alfred V. Aho, Brian W. Kernighan, and Peter J. Weinberger. Errata, sources. - http://plan9.bell-labs.com/cm/cs/awkbook/
Awk Frequently Asked Questions - Frequently Asked Questions (FAQ) from the comp.lang.awk newsgroup - http://www.faqs.org/faqs/computer-lang/awk/faq/
Availability of Awk (and Perl) - Obtaining Awk in source and precompiled executable form (with some general Awk links) - http://www.crossmyt.com/hc/htmlchek/awk-perl.html