Trello, a group project management tool that I reviewed in February, recently added support for Google Drive integration. This means that now you attach files from your Google Drive account to tasks and assignments in your Trello group.
Trello's user interface features a basic virtual corkboard-like space to which you and your collaborators can pin task cards. Task cards can be arranged into columns such as "to do," "in progress," and "completed." You can name and arrange the columns however you see fit. Each task card on your Trello board can be assigned to individuals in your group.
Applications for Education
For students working on group projects Trello could be a great tool for assigning and keeping track of the responsibilities of each group member.