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GeoPeeker - GeoPeeker is a tool for viewing sites from different geographic solutions.
Browshot - Browshot is a service to take screenshot of web pages. Use any of our mobile and desktop browsers. We provide a powerful API and libraries.
browserling - Live interactive cross-browser testing from your browser.
BrowserStack - BrowserStack is a software testing platform for developers to comprehensively test websites and mobile applications for quality.
BrowserCloud.io - Headless Browser Automation in the Cloud
Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.