Definitions

Informative Sites on Testing, Covers Definitions, Software Development Life Cycle Models, Test Plan and Different Levels of Testing

SQAtester.com maintains a good site providing test related information.

Bret Pettichord maintains Software Testing Hotlist that provides Resources for Professional Software Testers

Alan Richardson's company with interesting essays, useful links, and other software testing goodies

Rick Hower's site on QA and Testing FAQs, Links, Tools

Link to STORM site- A nexus of Software Testing Online Resources, this site is designed to be a "first-stop" on the Web for software testing researchers and practitioners.

Paper on Software Testing

An information resource for software testers on Tools, Contractors and Consultants, and Courses

Good site with valuable information on the Enterprise Software, Hardware, Services, and White Papers. Search with key word “Testing” to get valuable information and links on software testing.