Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
teampage - Create & Publish A Simple Responsive Team Page In Minutes.
Perfect Wiki - Build and organize your knowledge base of company resources without switching between workspaces
Pages by Process Street - Pages is a free-for-everyone knowledge base from Process Street.Try it out!
Knowledge Plaza - Knowledge Plaza is a SaaS Platform dedicated to Social Knowledge Management.
Dropbox Paper Mobile - Organize your team’s knowledge in a single place