Cameron McEfee has released a public alpha of GuideGuide 3 for Photoshop. It’s now built in HTML5 instead of Flash/Flex & lets you save presets & more.
GuideGuide 3’s major new feature is GuideGuide Notation (GGN), a language that makes it possible for you to “write” a grid… [It] allows you to create any combination of guides you can think up. Sidebars, baselines, golden ratio, you name it. If you can think of it, GuideGuide can create it.
[Via Pierre Courtejoie]