We are working on a unique eCommerce site. This site is distinctive because when a purchase is made its not made by one person, but a group or "Collaborative" decisions. Individuals can add items to the shopping cart, but in the end the purchase is decided by the group in a “Collaborative” effort or Team Effort. So each team member is given tasks, inter-team messaging, can rate functionality with surveys, set milestones, rank specific features that are important to them. Another big part is that many aspects of the site allow for comments from members of the group. So many of the items in the application are “comment able” by the team. Is there anything we can buy (C#/ASP.NET/MVC) that gives us this functionality. Comment, Task, Survey, Rating, Messaging, Ranking Collaboration engine?