Best Web Based Mockups Creation Tool

In last few days I spent couple of hours searching and trying different mockups creations tools/solutions. Some were only desktop based, otherwise were web based by paid. I was searching for great mockup tool that must be web based and free.

Why web based, I wanted to share my created mockups with my team members.

Here is the tool I finally have decided to pick. Hope you would like it too. https://moqups.com