Moodle is a free, open source course management system (CMS). Also know as a Learning Managment System (LMS) or Virtual Learning Environment (VLE). For further details please see the specific Moodle installation instructions.
STACK is a computer aided assessment (CAA) package for mathematics. It was mainly developed by Chris Sangwin (a developer of DragMath).
YourMathsTutor is a website created primarily to help students studying the for the UK's Key Stage 3, GCSE, AS and A Level mathematics and physics exams. DragMath has been integrated into the forum on this website. The forum is a Simple Machines Forum (SMF), which is a powerful open source forum. More information on how it was integrated and how it is used in the forum.
The Diambars institute is a training structure embracing sports and education located in Saly, Senegal.