Hivemind is described as 'A simple and intuitive knowledge management system' and is an app in the Business & Commerce category. There are more than 10 alternatives to Hivemind for a variety of platforms, including Online / Web-based, Linux, Mac, Windows and Self-Hosted solutions. The best alternative is TiddlyWiki, which is both free and Open Source. Other great apps like Hivemind are MediaWiki (Free, Open Source), DokuWiki (Free, Open Source), Confluence (Paid) and XWiki (Free, Open Source).
MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia. It is now used by several other projects of the non-profit Wikimedia Foundation and by many other wikis, including this website, the home of MediaWiki.
Instiki is a basic Wiki clone so pretty and easy to set up, you’ll wonder if it’s really a Wiki. Runs on Rails and focuses on portability and stability, Supports file uploads, LaTeX export, RSS feeds, S5 slideshows, multiple users and password protection.