Pencil Project
Pencil is a standalone app or Firefox extension that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.
Wireframe your Ideas iPlotz allows you to rapidly create clickable, navigable mockups and wireframes for prototyping websites and software applications. Create a...
Wireframe your IdeasiPlotz allows you to rapidly create clickable, navigable mockups and wireframes for prototyping websites and software applications.Create a project, add wireframe pages with design components and discuss your creations with others.
mockups wireframes wireframe-prototype design