Tool Short description:
Asana is a team management tool. It allows teams to share, plan, organise and track progress of the the tasks that each member is working on.
Link for more info:
User Interface Languages:
Asana is currently only available in English
Indicate whether Mobile version is available:
You can access their mobile web app from iOS or Android smartphone (not available for Windoes Phone or Blackberry)
Approximate no. of users that use the tool (Optional)

How entrepreneurs can or already use this tool for facilitating extensively the daily operation of their business and further development of their business? Please be specific and provide clear examples/use case scenarios that can be useful to other entrepreneurs/start up owners
Nyaya Health uses Asana in just about every aspect of its business. They use it to track fund-raising campaigns, plan how to get patients from rural Nepal to hospitals in Kathmandu, and even use it to test the computer literacy of job applicants.
"Email is the number-one tool people stop using inside their company when they start using Asana," says Kenny Van Zant, who handles business and operations at Asana. CEO Mark Arnoldy's experience confirms this: His internal email now only makes up about 20 percent of his messages, and many of those messages are just for fun. The real work and communication happens in Asana.
Though I've used Asana myself for some time, I wanted to more fully explore how it can be used in businesses to streamline communication and make teams more efficient. Mark Arnoldy, CEO, Nyaya Health - "Asana or bust" - read full case study
References of specific organisations or entrepreneurs/start up owners that are using the specific tool with success:
Kuty Shalev – Founder of Clevertech
"Asana is an amazing productivity tool for teams. We use it daily across the management team to distribute tasks, assign them to staff, and keep track of progress in a clean, uncluttered fashion"

Jim Williams – Founder of MustHaveMenus
"I love Asana as a project management tool to stay on top of priorities"
Cost and if a free version exists please explain what it offers in brief [Please provide a link with pricing details also]:
Asana offers a free version - Unlimited teams of up to 15 members. Unlimited projects and tasks.

There are also premium plans available which range in price from $50 per month to $800 per month - click here for full details