Anwiki is a Wiki and CMS that is dedicated to multilingual content. It is a translation center for "on-the-fly" collaborative translation and automatic multilingual coordination with revision history. It is an easy-to-use, advanced CMS for highly structured contents with XML/XHTML editing and PHP script editing.
LimeSurvey (formerly PHPSurveyor) is a Web application that interacts with MySQL, MSSQL, or Postgres to develop surveys, publish surveys, and collect responses to surveys. Once a survey has been created, data can be inserted into the survey either by a "pretty" public screen which presents each question one at a time, or by a quick and nasty data entry screen. It includes the capacity to generate individualized "tokens", so that invitations can be issued to participants. It also has the capacity to set conditions on whether questions will display (branching), numerous question types, and a basic statistics function.
One great project!