Mashups are lightweight composite applications that source all of their content from existing systems and data sources; they have no native data store or content repository. To access the resources that they leverage, mashups employ the technologies of the Web, including representational state transfer (REST) APIs, RSS and ATOM feeds and widgets.
Already used by organizations world-wide a Project Management Tool!
Woffice comes with several built-in demos that you can install in one single click. You can test the available demos here and feel free to challenge any presented feature.