SD Meeting Tool can be used to administer meetings and conferences. It was originally written by the Sweden Democrat party for internal use.
The plugin should be able to handle organizational and governmental meetings and conferences, by providing participant, voting, checkin, checkout, printing services, etc.
Some features, such as automatic updating of shortcodes for visitor pages, will require powerful hardware. The reason for this is that most shortcodes are completely dynamically generated without caching possibility. Having several hundred or thousand visitors requesting AJAX-updates of speaker lists or agendas will bog down WordPress (being a generally slow CMS to start off with).
Keeping the amount of visitors to a minimum, or even better: keeping the site internal and private, is recommended until further notice.
The documentation is available in the apidoc.7z file of the plugin. It meant to be read by a technically-able person who will then configure and administer the meeting tool.