WP is one of the most "popular" meaning most installed. His challenger is Joomla, less "popular" (less installed) but certainly to my opinion better.
Much robust (his code is clean and strong), a lot of native things like multilingual support, ACLs (users's rights and permissions), an administration interface natively responsive and accessible (for people having some difficulties),...
For me, and this is purely personal, joomla is far better.
WP is one of the most "popular" meaning most installed. His challenger is Joomla, less "popular" (less installed) but certainly to my opinion better.
Much robust (his code is clean and strong), a lot of native things like multilingual support, ACLs (users's rights and permissions), an administration interface natively responsive and accessible (for people having some difficulties),...
For me, and this is purely personal, joomla is far better.
launch.joomla.org/