Balsamiq is an electronic mockup tool to develop desktop applications, web applications, web sites, RIA and iPhone applications. It uses a library of hand-drawn controls (intentionaly) which you can extend with your own.
There are multiple ways to share the wireframes (PNG, interlinked PDF pages, online versions,...) and to gather feedback. It is designed for collaboration, in face-to-face or online meetings.
"Put that pencil down - Using Balsamiq Mockups feels like you are drawing, but it's digital, so you can tweak and rearrange controls easily, and the end result is much cleaner. Teams can come up with a design and iterate over it in real-time in the course of a meeting."
- Balsamiq Mockups: Product Tour & Features
- Balsamiq Mockups: Online demo
- Balsamiq Homepage
- June 28, 2019
See also: Web page design (41) Prototyping and wireframing (120)