[eropple]

I get where you're going with this, but I personally find a grid framework and CodeKit auto-reload to be a better way to do mockups in most cases. It's nicest with two monitors; I make changes on my screen and we can both look together at the changes in the browser.

I don't really care about having a nice color picker when punching in a value into Less is so easy (and if I really want something visual I use either http://colourco.de or http://colorschemedesigner.com/ . I don't care about shapes because I'm working in the grid. I get what I need, faster and cleaner, than screwing around in Photoshop.