ThinkVitamin - Carsonified's blog about the web

A/B testing is one of the primary tools in any data-driven environment. You can think of it as a big cage match. Send in your champion versus several other challengers and out comes a victor.

Cross-browser compatibility is still one of the most complex issues when it comes to web-development...

JsUnit is a Unit Testing framework for client-side (in-browser) JavaScript. It is essentially a port of JUnit to JavaScript. Also included is a platform for automating the execution of tests on multiple browsers and mutiple machines running different OSs.

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Browsershots makes screenshots of your web design in different browsers. It is a free open-source online service

UserVue is an online service that lets you remotely observe and record users’ desktops as they navigate applications and sites