Test::Tutorial: http://magnonel.guild.net/~schwern/talks/Test_Tutorial/
Audio from YAPC 2002: http://www.perl.org/yapc/2002/audio/schwern-test-tutorial.wav.mp3
talks: http://magnonel.guild.net/~schwern/talks/
Test::Simple tutorial: http://search.cpan.org/author/MSCHWERN/Test-Simple-0.47/lib/Test/Tutorial.pod
How to Be Lazy: http://magnonel.guild.net/~schwern/talks/How_To_Be_Lazy/
How to Be Lazy Redux: http://magnonel.guild.net/~schwern/talks/How_To_Be_Lazy_Redux/
Embedded Testing: http://magnonel.guild.net/~schwern/talks/Embedded_Testing/
CPANTS: http://magnonel.guild.net/~schwern/talks/CPANTS/
Writing a Test Library: http://magnonel.guild.net/~schwern/talks/Writing_A_Test_Library/
Grand Index of testing techniques: http://www.testingcraft.com/techniques.html#developer-testing
Classic Testing Mistakes: http://www.testing.com/writings/classic/mistakes.html
Brian Marick: Faults of Omission: http://www.testing.com/writings/omissions.html
http://search.cpan.org/
http://qa.perl.org/
http://testers.perl.org/
Ariane 5 Flight 501 Failure report: http://java.sun.com/people/jag/Ariane5.html
The Tacoma Narrows Bridge Failure: http://www.vibrationdata.com/Tacoma.htm
Therac-25 X-Ray machine: http://courses.cs.vt.edu/professionalism/Therac_25/Therac_1.html
Collection of Software Bugs: http://wwwzenger.informatik.tu-muenchen.de/persons/huckle/bugse.html
Steven Pietrobon's Space Archive
El Lutzo's LEGO© Homepage LDraw and POV-Ray Tools: http://www.el-lutzo.de/lego/files.html