Managing guides in Photoshop is difficult, specially when dealing with lots of them. GuideGuide makes it easy to have columns, rows, midpoints and baselines based on your document or selection.
The plugin works with Photoshop CS5, CS6 and CC and is simple to install. You can also use the plugin to measure exactly how wide a navigation element should be to fit evenly across the width of a site, as well as creating baseline grids and element padding.
