Quality Tree, Inc.
A collection of essays, articles, 'ruminations' and QA links.
http://www.qualitytree.com/

Software Testing Institute
Quality publications, industry research and online services for the software development and testing professional.
http://www.softwaretestinginstitute.com/

Compendium Developments Ltd.
Software testing and software quality essays, book reviews, and tools. Authors of Compendium-TA, a commercial modeling tool.
http://www.compendiumdev.co.uk/

Developer Testing, discussions about software quality
Website where staff members of Agitar Software place personal articles about what they know best: practices for software development and software testing that lead to better software quality.
http://www.developertesting.com

STAQS - Software Testing and Quality Services
Resources and information for software testers, programmers, software engineers, and students interested in testing.
http://www.staqs.com/

Software Testing
Weblog on software testing, testing tools and resources.
http://testavimas.blogspot.com

Extreme Testing
Software QA and testing resources, testing methodologies and techniques complemented by a testing dictionary, interview questions, a quiz, book reviews, templates, test cases, grey box testing and recommendations.
http://www.geocities.com/xtremetesting/

QThreads.com
News, articles and room for users blogs about software quality, testing, processes and CMM.
http://www.qthreads.com

Software Testing Weblog
This weblog features various topics about software testing. Registered users may add articles and discuss issues related to highlighted topics.
http://testingsoftware.blogspot.com/

Professional Tester
An English-language quarterly magazine targeting professional testers of software worldwide. Offers online articles, jobs, information about testing companies and an event calendar.
http://www.professionaltester.com/

Testing Foundations
Brian Marrick, author of the book 'The Craft Of Software Testing', provices information about the services he offers, downloadable writings, and tools developed by himself, complemented by his weblog and resources about agile testing.
http://www.testing.com/

The Test Management Guide
Offers an alphabetic listing of terms and information about risk management complemented by general information on test management, and methods, the V model, the Quality Gate process and the BS7925-2 standard for software component testing.
http://www.ruleworks.co.uk/testguide/

LogiGear Corporation
Providing software testing solutions including test tools, services and training, and a defect tracking solution. Offers articles by testing professionals, links to books and resources.
http://www.logigear.com/

SmartWare Technologies, Inc.
Offers SmartTest, a test case/test data generation tool, a review tool and a test method, complemented by related services including training, assessment and process improvement, and test data design.
http://www.smartwaretechnologies.com/

SoftwareTestingWiki
A collaborative software testing and quality assurance resource also including general information about software development.
http://www.softwaretestingwiki.com/

Software Testing
Offers definitions, articles, and a directory of tools.
http://www.software-risk.co.uk/

DCTester Portal
Portal with user forum, jobs, news, events, books and publications for software testing and software development professionals in the Washington DC area.
http://www.effectivesoftwaretesting.com

Software Testing Sucks
Offers software testing information covering tools, testing types, Glossary/Vocabulary, Frequently Asked Questions (FAQ), Processes and Metrics complemented by testing jokes and history of Costly software bugs.
http://www.softwaretestingsucks.com/

Software Testing
A platform for sharing the knowledge of Software Testing, Testing Tools and Techniques, approaches and methodologies.
http://www.testinggeek.com/