We tried a Lot of Project Management Tools for our Projects, But we Finally decided to stick with Trello. The Main thing i Like about Trello is the UI.
Here Projects are represented by boards, which contain lists (corresponding to task lists). Lists contain cards (corresponding to tasks). Allows easy interactions with lists via drag and drop. Support Dropbox and Google drive for external attachments.
please give a try it here trello.com
The one thing that makes trello is not a super project is Time Tracking ( Time tracking is not possible now).
Found out that the Harvest extension can give time tracking support to Trello
Please check the Follow Video on how to include time tracking in your trello tasks.
Hope this will help someone!!! Please sharing and help others.