Anthony

This plugin will limit access to the site. Only visitors with a cookie token will be able to access the public website. Visitors without the cookie will see a “coming soon” style of page.
You can customise the “coming soon” content, and you can change the way tokens work. Visit yoursite.com/?add_token to receive the token allowing you to see the site. To remove the limited access, simply disable this plugin.
By default, the token is “letmein”. So use these links: 
site.com?letmein 
site.com?takemeoff
This plugin is useful when you’re developing your site. You can work on your live web server without having your site open to the public.

Token Access

Limit access to the site to those with a cookie token.  Visitors without the cookie see a customisable "coming soon" style of page.

Erin Bell

Center for Public History + Digital Humanities

<h4>PlacePress</h4>
PlacePress adds Location and Tour post types, structured map blocks (for single and global locations), structured tour stop blocks, and custom taxonomies.
<a href="https://wpplacepress.org/about/showcase/" rel="nofollow ugc">View Demos</a> at wpplacepress.org.
<a href="https://wpplacepress.org/about/getting-started/" rel="nofollow ugc">Read the User Guide</a> at wpplacepress.org.

PlacePress

An elegant mapping solution for public historians, urbanists, and other humanities researchers.

Token Access vs PlacePress