Alternatives to ForeUI for all platforms with any license

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. The Pencil...
- Discontinued
  No longer maintened
Free Open Source Mac Windows Linux PortableApps.com Electron / Atom Shell ... Firefox
Firefox Extensions Prototyping Cliparts Diagrams ... Drawing Firefox Extensions Sketching Wireframing Add a feature

371 Like
Lucidchart

Lucidchart is a visual workspace that combines diagramming, collaboration, and data visualization to accelerate understanding and drive innovation. With this intuitive...

Freemium Mac Windows Web Android iPhone ... Chrome OS Android Tablet iPad Zapier bambooHR Amazon Web Services Microsoft Office Powerpoint Microsoft OneDrive Jira Microsoft Office Word Google Drive Slack Google Drive - Docs Quip Microsoft Teams Software as a Service (SaaS) Salesforce.com Google Apps Microsoft Azure Microsoft Office 365 Google Drive - Sheets GitHub Microsoft Office Suite LinkedIn Confluence Microsoft Office Excel
Real time collaboration UI Design Scalable UI Team Collaboration ... Charts Diagrams Flow chart General-purpose diagramming Online collaboration Prototyping Real time collaboration Export to PDF Sequence Diagrams UML diagrams Visitor management Web-Based Wireframing Add a feature

502 Like
Balsamiq Wireframes

Balsamiq Wireframes is a rapid low-fidelity UI wireframing tool that reproduces the experience of sketching on a notepad or whiteboard, but using a computer. FEATURES...

Commercial $ $ $ Mac Windows Web
Drawing Real time collaboration Wireframing Add a feature

114 Like
Marvel

The collaborative design platform. Wireframe, prototype, design online and create design specs in one place. Or create an integration with our API.

Freemium $ $ $ Android iPhone Android Tablet iPad Apple Watch ... Apple TV Apple Messages Software as a Service (SaaS)
Prototyping Anonymous Commenting Built-in Commenting System Add a feature

24 Like
Axure RP

The most powerful way to plan, prototype, and hand off to developers, all without code.

Commercial $ $ $ Mac Windows Sketch
Prototyping Add a feature

37 Like
Diagramo

Diagramo is an online flowchart software - diagrams (create, edit and share) - organization charts (create, edit and share) - network diagrams (create, edit and...

Free Open Source Web
Export to PNG Flow chart Graphs Web-Based Add a feature

17 Like
MockFlow

Nothing to download/install, create and access your mockups from anywhere. Add pages with templates and define links to present a clickable prototype. Our...

Freemium Web Software as a Service (SaaS)
Export to HTML Internal links Interface Layout ... Real time collaboration Wireframing Add a feature

19 Like
Flinto

Flinto for Mac is a comprehensive app prototyping tool that allows you to create anything from simple tap-through prototypes, to comprehensive prototypes with impressive...

Commercial $ $ $ Mac iPhone
Prototyping Add a feature

7 Like
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Wireflow

Wireflow is free, online, open source, real-time collaborative tool for creating beautiful user flow prototypes.

Free Open Source Web Self-Hosted
Collaborative whiteboard Flow chart Group collaboration UI Design ... Kanban boards Real-time Real time collaboration Team Collaboration Wireframing Add a feature

3 Like
Mockup Designer

Mockup Designer, built with Backbone, Backbone-LocalStorage and Html2Canvas, is a super-easy-to-use mockup tool that uses the local storage of your browser as its...

Free Open Source Web Self-Hosted
Prototyping Add a feature

12 Like