To give you an idea, CAP'Santé 93 (online since 2015) is using most of my favorite modules/plugins.
The first version was based on Joomla 2.5.
Other websites are samples but may be online soon.
These websites are based on Joomla! and users may update them.
Go to Joomla! favorites modules/plugins to see what tools have been used to build them.