Migration of the old Joomla! 2.5 to Joomla! 3 in June 2013 (same thing with aide-joomla.com website).
I took care of the template under Gantry replacing the old Optimus template of Joomlashack. Stéphane and Florian did the rest.
The choice of the new template was long and was based on 3 main points:
- Keep the graphic identity of the old site,
- Being "Responsive" that is to say readable on tablet and smartphone,
- At best be free template.