What are some alternatives?
When comparing Acknow and AMuseWiki, 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.
Wikibooks - Wikibooks is a Wikimedia community creating a free library of educational textbooks that anyone can edit.
Bloomfire - Let Bloomfire help you get organized! Organize your content, build your company knowledge base and help your employees to be more successful.
CodeTactic CMS - The CodeTactic CMS is a custom content management system based on PHP.