WP Remote - WP Remote provides a single place to monitor and update all of your WordPress sites.
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
ManageWP - ManageWP is a service for bloggers, site owners and web based companies helping them manage multiple WordPress sites from one dashboard.
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
InfiniteWP - Manage unlimited https://alternativeto.net/software/wordpress/ sites from a central admin panel.
Tiki Wiki CMS Groupware - Tiki Wiki CMS Groupware, also known as Tiki (or TikiWiki), is a full-featured, web-based, multilingual, all-in-one Free/Libre Open Source Software solution. Tiki can be used to create all kinds of web apps, portals, knowledge bases, intranets, etc.