ContentFly - Simple and reliable content ordering platform for busy marketers. Only pre-vetted writers from USA & Canada and 14-day money-back guarantee.
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
1SecondCopy - Replace unreliable content freelancers with a flat monthly fee. Pay only if you love the results.
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.
Narrato.io - Narrato Workspace is an all-in-one content workflow, project management, and content collaboration software for content teams, marketing teams and agencies, and businesses.
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.