Is there any software like Balsamiq Mockups to have a mockup of your business plan?
I need to show the how things will work as a biz plan instead of how things will work on the website.
As far as I saw in their page http://www.balsamiq.com/products/mockups#examples it's only about the website or applications.
You're looking for a "business plan template".
Sequoia Capital offers a guide and outline to what they look for in a business plan as well:
In lean startups, it's meant to be an evolving document that helps you keep track of the assumptions under each category that you are testing.