C3 (center for cross-discipline collaboration) is a web platform geared towards supporting collaborative websites for NASA researchers and their partners in the scientific community The platform is a web application that can run one or many C3 instances (such as DASHlink, NEX, or Water). It is possible to host several C3 sites on the same hardware and use the common code base. Each C3 website can be customized in several ways. Different themes can be applied to change the look and feel of the site, while plugins (Django applications) can be enabled to extend functionality beyond what already exists. The code is written in python and uses a MySQL database to store the site content.