Alternatives to Indigo Studio 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...

Free Open Source Mac Windows Linux PortableApps.com Electron / Atom Shell ... Firefox
Cliparts Firefox Extensions Wireframing Add a feature

336 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
Real time collaboration Add a feature

105 Like
InVision

InVision's prototype tool lets you create interactive wireframes and high-fidelity prototypes. Share your work and get instant feedback right on-screen.

Freemium Web
Import from Sketch Basecamp integration GitHub integration Group chat ... Jira integration Kanban boards Support for @mentions Real time collaboration Slack integration Trello integration Add a feature

63 Like
Marvel

Marvel is a free prototyping tool that transforms static design files (like Photoshop files, PNG etc) and sketches into interactive, sharable prototypes that look and...

Freemium Web Android iPhone Apple Watch tvOS
Anonymous Commenting Built-in Commenting System Add a feature

22 Like
Origami Studio

Origami Studio is a free design tool built by Facebook designers for creating interactive UI prototypes. An elegant, layer-based interface allows designers to repaidly...

Free Mac Android iPhone
No features added Add a feature

11 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
Real time collaboration Add a feature

17 Like
STUDIO

STUDIO lets you easily design & publish websites from scratch without writing any code. With the option of starting from a blank canvas, wireframe or template, you...

Freemium $ $ $ Web
Custom types builder Responsive design WYSIWYG Support Add a feature

5 Like
Atomic

Work your way up from a blank canvas, or pull in designs from Photoshop or Sketch. Lay out your states and instantly animate between them, without coding a thing. Share...
- Discontinued Atomic announced the end of their prototyping tool and a new direction for Atomic
Freemium $ $ $ Web
No features added Add a feature

7 Like
Moqups

A streamlined web app that helps you create and collaborate in real-time on wireframes, mockups, diagrams and prototypes.

Freemium Web
Real time collaboration SVG Editors Add a feature

72 Like
Wired Designer

Wired Designer is a mockup tool built using web components from the Wired Elements library. It's made by the author of Rough.js...

Free Open Source Web Self-Hosted
No features added Add a feature

1 Like
ProjectHuddle

Use your existing WordPress site to get feedback on your design projects. Upload your design images, wireframes, mockups, logo sketches, photography and more. Gather...

Commercial Self-Hosted Wordpress
Customizable Real time collaboration Add a feature

8 Like
mockingbird

mockingbird is an online tool that makes it easy for you to create, link together, preview, and share mockups of your website or application. It is not Flash based.

Commercial Web
No features added Add a feature

20 Like
Fluid UI

Fluid UI is the fastest mobile app prototyping tool available. Design and test your low and high fidelity app mockups on a mobile device with ease. Simple and UX...

Freemium Web
Real time collaboration Flow diagram visualisation Live Preview Export to PDF Add a feature

16 Like
Prototype Composer

Serena Prototype Composer - the best agile application prototyping tool is now free! View the demo, take the product tour, or download it free today.

Freemium Windows
Wireframing Add a feature

4 Like
SwordSoft Layout

SwordSoft Layout is an desktop application that makes it very easy for you to create, preview, and manage mockups of your website, mobile application or desktop...

Commercial Mac Windows
No features added Add a feature

4 Like