When comparing Fireworks vs Diagrams.net, the Slant community recommends Fireworks for most people. In the question“What are the best mockup and wireframing tools for websites?” Fireworks is ranked 4th while Diagrams.net is ranked 6th. The most important reason people chose Fireworks is:
From lo-fidelity wireframe, into clickable prototype and then assemble the images for the final hi-fi build as well.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Can be used for the entire life-cycle of the design
From lo-fidelity wireframe, into clickable prototype and then assemble the images for the final hi-fi build as well.
Pro Layer Sharing
Features such as 'Layer Sharing' allows you to quickly update shared components such as headers across multiple pages. Other mockup tools such as Mockingbird will require you to manually propagate changes across all the pages.
Pro PSD compatible
Open PSD files
Pro Awesome Symbol Libraries
A significant advantage over web-app style mockup tools are the symbol libraries for Fireworks.
From boagworld:
Both symbols, styles and vector shapes can be saved for re-use and collected into useful library resources. In addition Fireworks ships with a common library of useful objects including buttons, browser and application elements for both Mac and Windows look and feel.
http://speckycdn.sdm.netdna-cdn.com/wp-content/uploads/2010/10/ui_templates_02.jpg
Pro Rich functionality for a web-based application
Pro Integrates with multiple cloud storage services
Draw.io offers saving files directly to services such as Google Drive, OneDrive or Dropbox along with saving to to computer.
Pro Real-time collaboration
Pro Great flexibility customizing text labels
Pro Completely free
Pro There is also a Desktop version
Pro Good list of different output formats
Draw.io supports export for PNG, GIF, JPEG, PDF, SVG, HTML, and XML.
Pro Internet Explorer 6-8 and touch device support
Draw.io works with every browser (even IE 6) without plugins.
Cons
Con Is being phased out
Adobe is ditching Fireworks. So those nasty bugs will never get fixed.
Con Import from Visio .vsd is useless
Even simple diagrams get all scattered.
Con Behaves strangely for certain diagram types
For example the snapping function for arrows doesn't work properly for the sequence diagram template.