If you, like me, find yourself with squillions of tabs open in Chrome hogging your DRam try this! The Great Suspender suspends tabs to free up Chrome’s memory automatically. The tool allows for automatic and manual suspending, configurable in settings. The settings also allow you to set a whitelist of sites that won’t get suspended.
I have used this for a week or so and find it even more useful than Onetab as it automatically suspends tabs that you aren't using but one click and they are restored! Try it!