Balsamiq Mockups

Using Balsamiq Mockups feels like you are drawing, but its digital, so you can tweak and rearrange controls easily, and the end result is much cleaner.

Commercial Mac OS X Windows Web

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 feel like real apps and websites

Freemium Android iPhone Web Apple Watch tvOS

quickMockup

Online tool for creating mockups in the browser. Use your browser’s save function to save the file (just html for view only, complete save for an editable version) or...

Free Open Source Mac OS X Windows Linux Web Self-Hosted

Form

Instant Native Prototypes. Form lets you build custom native prototypes directly on the device.

Free Mac OS X

Composite

Automatically connects to your Photoshop document and converts your mockups into interactive prototypes using layer comps to organize your documents into screens....

Commercial

Briefs

Briefs is the essential app design tool built for a professional design workflow. Lifeless mockups don’t tell the entire story, but you don’t have time to build a...

Commercial

App Cooker

Create stunning mockups or wireframes of iPhone and iPad Apps. Export clickable prototypes and share them for free with AppTaster. Master iOS projects!

Commercial iPad

ProtoTouch

Create, Preview, Share and Install in any iPhone iPod iPad or web browser your mobile prototypes without a single line of code. Add screenshots from Dropbox, using your iPhone library or taking pictures from drawings.

Commercial iPhone

BluePrint (UI design)

Blueprint is an UI design application for iPad and iPhone

Commercial iPhone iPad

Prototypr

Prototypr helps you build prototypes rapidly and easily. Import images from Photoshop, link the screens, upload the result onto an iOS device over WiFi and show it off...

Commercial

AppTaster

Share mockups and wireframes with clients on their iPhone or iPad. It revolutionizes the way you get feedback on your projects and improve them.

Free iPhone iPad