Hello,

Is there a plugin that will allow visitors to sign up to multiple sites during registration? These people seem to have done it: `http://injersey.com/join-injersey/`
If such a plugin does not exist, could you please tell me which hooks I should be looking at to create this feature? I thank you in advance.

[@aminima Participant 14 years, 6 months ago]

Not choosing sites from signup process, but after registrations, you can place this widget to the sidebar of a site so as to users can register with that site.

https://wordpress.org/extend/plugins/add-users-sidebar-widget/