I needed to write some Selenium WebDriver scripts and since I couldn't find a good REPL for it, I wrote this one in the last coupe days:
I'm actually really happy with how it turned out:
See https://github.com/o2platform/webkit-repl for the execution instructions, the code and more screenshots
This UI is based on https://github.com/rogerwang/node-webkit and the selenium/webdriver integration is provided by https://github.com/admc/wd