Optimizely: A/B testing software you'll actually use
What is the best site to find A/B tests case studies?
12 Surprising A/B Test Results to Stop You Making Assumptions
When do overlays work best? - BEHAVE
The Critical Difference Between A/B and Multivariate Tests
World's Easiest A/B and Split Testing Software - Visual Website Optimizer.
A/B Test Beta - devot:ee - Devoted to ExpressionEngine
Google A/B Testing with ExpressionEngine, Structure & Freebie | Blog | FortySeven Media
A/b Testing | MarketingExperiments
Browserling - Live interactive cross-browser testing
Methodology | MECLABS
How to Experiment With Controversial Content (Without Alienating People)
Cross Browser Testing Tool. 1000+ Browsers, Mobile, Real IE.
Get a peek into the mind of your users. | Peek by UserTesting
UserTesting | User Experience Research Platform
Online Penetration Testing Tools | Ethical Hacking Tools
Responsive Design Testing across Mobile and Desktop Browsers - iOS, Android, OS X, Windows
UX Research Recruiting, User Research Recruiting, and Usability Recruiting
Headlines are the most important part of your website
QuirkTools / Online Tools for Creative People
Landing Pages: Create, Publish & A/B Test Without I.T. | Unbounce
What To Do When Your Website Goes Down | Smashing Coding
10 Simple But Effective Tips to increase your Google AdSense Earning.
Optimizely: A/B testing software you'll actually use
Check Browser Compatibility, Cross Platform Browser Test - Browsershots