Pro Supports customizable grids
One of the nicest features of Mockingbird is the support for customizable grids, with support for commonly used frameworks such as Blueprint and 906gs. This makes life easier for designers to translate the wireframes into high fidelity designs.
Pro Polished user experience
Mockingbird gets all the little things right. Snap to grid, smart guides etc.
Pro Easy to create clickable demos
You can link together multiple pages to simulate user workflow
Pro Comprehensive UI element library
Pro Can try it for free
Works without needing a plugin.
Con No updated anymore
Hasn't been updated in 5 years.
Con No images
You can't import images
Con Very slow
Mockingbirg becomes very slow when you have a lots of elements