What are some alternatives?
When comparing Acknow and DokuWiki, you can also consider the following products
Document360 - Self-service knowledge base software focused on SaaS Products & Enterprise Software Projects.
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
HelpJuice - Helpjuice is easy-to-use knowledge base software that guarantees. 50% less support emails and happier customers.
TiddlyWiki - a non-linear personal web notebook
Bloomfire - Let Bloomfire help you get organized! Organize your content, build your company knowledge base and help your employees to be more successful.
Confluence - Confluence is content collaboration software that changes how modern teams work