
Moqups
7.6#4 in wireframing softwareFrom $11 a monthFree planWebAPIExtension
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Moqups suits individuals and teams creating wireframes, diagrams, and interactive prototypes. Its real-time collaboration and browser extensions may also suit teams that want shared editing and webpage-to-layout workflows.
Wirify suits people who want a quick structural view of a webpage for layout review, learning, or teaching. It is intended for users comfortable adding a bookmarklet to a browser toolbar.