Woffice is a feature rich, powerful Multipurpose Intranet and community WordPress theme.
Demo: https://themeforest.net/item/woffice-intranetextranet-wordpress-theme/11671924
Anesta is a modern, fresh and clean intranet / extranet WordPress theme with a focus on performance and usability.
Demo: https://themeforest.net/item/anesta-intranet-community-and-buddypress-wordpress-theme/38185608
Alliance is a modern, fresh & clean intranet / extranet WordPress Theme with the accents on performance and usability.
Demo: https://themeforest.net/item/alliance-intranet-extranet-wordpress-theme/12087162
A simple and functional JA Intranet template with a minimalistic design and easy customization will help you create your own unique website for your intranet, social network, forum or blog. Intuitive interface - everything is strict and stylish.
Demo: https://joomlart.com/joomla/templates/ja-intranet