In 2015, the software company Qosqo who supported the development of Quipu decided to abandon the open source project as it was. The latest open source release (version 2.x) is what you'll find here. The development moved on in closedsource at http://www.datawarehousemanagement.org, currently (March 2016) at version 3.2.
The open source description:
Quipu is an open source data warehouse generation system that creates and monitors data warehouses. ...
LimeSurvey is a survey software to create online surveys. Features open/closed surveys, branching, participant administration, quotas, WYSIWYG HTML editor, email invitations & reminders, assessments, basic statistics and more.