Flatsies

Flatsies is a tool for designers to share their concepts with clients in a simple and elegant way.

20 Alternatives To Flatsies

AppCooker

Design, mockup and prototype mobile applications with AppCooker. Discover the most powerful mockup engine ever created on the iPad. AppCooker and AppTaster deliver the full scope of the prototyping tools.

Atomic

The fastest way to design beautiful interactions

Balsamiq

Balsamiq. Rapid, effective and fun wireframing software.
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Figma

Team-based interface design, Figma lets you collaborate on designs in real time.

Invision

Prototyping and collaboration for design teams

Kivo

Annotate and share PowerPoints and PDFs online in seconds, without signing up.

Looping

Fast community feedback on all your designs.
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Mockplus

Mockplus is a desktop-based prototyping tool.
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NinjaMock

NinjaMock is the faster, better and funnier way of making mockups
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Notable

Better interfaces through faster iteration

Notism

What’s next after wireframes? Visual Design and Notism.

Pixelapse

Visual version control and collaboration workflow for open source and private design projects.

ProjectHuddle

Get design feedback and client approval using WordPress.

Proto

Proto® Mini Impact Wrenches- Pistol Grip Proto® Flex Head Precision 90 Pear Head Ratchets Proto® 550E 88" Power Workstation - 18 Drawer, Safety Red and Gray J558846-18SG-PD Proto® 550E 88" Power Workstation - 18 Drawer, Safety Red and Gray Proto® Mu…

Red Pen

Red Pen lets you upload your design, share a short URL, and get live, annotated feedback super-fast.

Savahapp

The all-in-one design sharing, collaboration, workflow and app prototyping platform
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Shipment App

Share and review your designs. Easy collaboration on creative projects.
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Specfox

A free platform for creating beautiful website and mobile app specification documents for your team. No more word templates!

zipBoard

ZipBoard is a web-based visual bug tracking & issue tracking tool that helps developers, testers and project managers collaborate during website and elearning development.