Tettra is described as 'Simple way for your team to document who you are, what you do, and how to achieve results' and is a document manager in the office & productivity category. There are more than 50 alternatives to Tettra for a variety of platforms, including Web-based, Windows, Linux, Self-Hosted and Mac apps. The best Tettra alternative is TiddlyWiki, which is both free and Open Source. Other great apps like Tettra are MediaWiki, BookStack, Foam and DokuWiki.
Balsa has a company-wide knowledgebase that you can store and share your most important documents within the company, using highest security standards.
Zoho Wiki is Free Hosted Wiki with WYSIWYG Editor, Access Control, Versioning, Search Engine Friendly, Tags, Dashboard, Moveable Sitemap, RSS. Create pages in your wiki, Collaborate with anyone, Share information with Organization or Group or Everyone in the world.
Foswiki is the free and open source enterprise collaboration platform. Foswiki is a wiki, so you and your team members can collaborate and edit pages directly in the web browser. For advanced collaboration, Foswiki lets you enter macros to automate pages and build entire applicat.
SlimWiki is an easy to use Wiki / knowledge sharing platform for teams with a beautifully simple editing experience.
TWiki is leading open source enterprise wiki and Web 2.0 application platform used by 50,000 small businesses, many Fortune 500 companies, and millions of people. The Structured Wiki has hundreds of plugin and is used as an intranet or extranet to run project and team...
Documize creates the Enterprise Knowledge Backbone by unifying docs, wiki, reporting and dashboards — composition + coordination + discovery + distribution + workflows = faster business outcomes
Doit is the new and easy way to get organised. Take notes, manage projects, share ideas, and collaborate - all in one place.
Free open source software combining the best of wiki and CMS with community building-features.
Lessons Learned Server is a light-weight knowledge-base web application with powerful editing capabilities. Based on PHP and MySQL. Available as a downloadable server application or via cloud hosting.
Ikiwiki is a wiki compiler. It converts wiki pages into HTML pages suitable for publishing on a website. Ikiwiki stores pages and history in a revision control system such as Subversion or Git. There are many other features, including support for blogging, as well as a large...
With Papyrs you can build your own intranet with simple drag & drop and work better together with colleagues and clients. Easily share and collect information, files, discussions, online forms and much more.
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It's a great look-alike with similar functionality. Same price though it's not open source. $5/user per month unless your team is tiny with only 3 people.