We cover a lot of languages and other topics in this course, usually not in enough detail for you to start programming right away. This page collects some useful summaries and tutorials to help you get going. Google points to lots more. Quality varies; if you find better ones to augment or replace these, please let me know.
AWK: my help file; vectorsite
Perl: my help file; Perl home page; Picking up Perl; CGI programming in Perl
Python: my help file; official tutorial; Python idioms
PHP: one, two
C++: Doug Schmidt; functionx.com; STL by Jak Kirman
Java: my help file; Sun's Java documentation; Java Tutorial, with several books online.
C#: one, and many more.
Visual Basic: vbtutor.net Visual Basic Tutorial.net
Tcl/Tk: one of several
Databases: my help file; MySQL; PHP & MySQL tutorial
Source Code Control: my help file; Subversion (SVN); GIT book.
HTML: one, two, three, of many
CSS: one page of many; CSS Zen Garden (quite remarkable)
Web: W3schools.com: lots of web technologies; XML & Java from Sun
Miscellaneous: my gdb help file