Using wp single login you can easily add the functionality to allow only single login per user.
More Plugins
-
Inline Image Upload for BBPress
-
Interact: Embed A Quiz On Your Site
-
Custom Add to Cart Button Label and Link for WooCommerce
-
Ultimate Post List
-
LiveChat – Live Chat Plugin for WP Websites
-
Minimum Order Amount for Woocommerce
-
Zigaform – Price Calculator & Cost Estimation Form Builder Lite
-
BuddyPress Builder for Elementor – BuddyBuilder
-
Where Did You Hear About Us Checkout Field for WooCommerce
-
Advanced Marquee Effect for Elementor
-
Helpie FAQ — Accordion, Docs & Knowledge Base
-
Faview – Virtual Reviews for WooCommerce
-
Multiple external product URLs for WooCommerce
-
Kirki – Freeform Page Builder, Website Builder & Customizer
-
FluentCart A New Era of eCommerce – Faster, Lighter, and Simpler
-
Newsletter – Send awesome emails from WordPress
-
TableOn – WordPress Posts Table Filterable
-
WC – APG Free Shipping
-
Admin Global Search
-
Tag, Category, and Taxonomy Manager – Autotagger Automatically Add Terms