Need to collaborate with team members online? this could be what you are after

Need to collaborate in "Real Time".. with your team?? Google ... direct support in Google Drive... Its impressive ! 

The pricing models:

Free- 3 boards, 100MB of storage - basic, although very usable

Premium - $10 - unlimited boards, 3GB storage ...

Team - $10/user/Month- unlimited boards, 3GB storage ...few extra features

Check it out !! 

Any questions? let me know
Matt !