Tiggr is described as 'application for creating user interface prototypes collaboratively online' and is an website in the Development category. There are more than 10 alternatives to Tiggr, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Self-Hosted solutions. The best alternative is Lucidchart, which is free. Other great sites and apps similar to Tiggr are Balsamiq Wireframes (Paid), Moqups (Freemium), Wireflow (Free, Open Source) and Mockup Designer (Free, Open Source).
Lucidchart is a visual workspace that combines diagramming, collaboration, and data visualization to accelerate understanding and drive innovation. With this intuitive, cloud-based solution, everyone can work visually and collaborate in real time.
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 backend. However the data layer is loosely coupled, so you can integrate with any RESTful API or any Backend service.
Nothing to download/install, create and access your mockups from anywhere. Add pages with templates and define links to present a clickable prototype. Our components are of medium-fidelity not very sketchy or look too real. Its just right.
WireframeSketcher is a software tool that helps quickly create wireframes, mockups and prototypes for desktop, web and mobile applications. It comes both as a plug-in for any Eclipse-based IDE and a standalone version.
An online diagramming tool with built-in productivity features to create diagrams faster. Draw flowcharts, mind maps, org charts, network diagrams, Venn diagrams and 50+ other diagrams types. Readymade templates to get started fast.