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.
Wireflow is free, online, real-time collaborative, open source tool for creating beautiful user flow prototypes.
With the Marvel design platform, access all the core functionality you need to build digital products - wireframe, prototype and generate design specs in one place.
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 oriented, this UI tool helps unlock creativity and will save your team time and money while gathering app...
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 prototype. We’ve been there, too. Your clients needed a clearer picture, so give them something to touch.This app doesn't have any features at the moment.
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 to your fellow developers and product owners. Want to showcase the design on a bigger screen?This app doesn't have any features at the moment.Discontinued
The program is no longer developed, but last version, 1.2.2, released on Mar 25, 2014, can be still downloaded from the official website.
Creo is a next generation Mac tool which aims to combine the Design and Development process into a single easy to use application. Traditional app creation process is split between the design process (done by designers usually using a prototype tool that simulates mobile OS...This app doesn't have any features at the moment.