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XWiki

wikidPad is a Wiki-like note taking application for storing your thoughts, ideas, todo lists, contacts, or anything else you can think of to write down. What makes wikidPad different from other notepad applications is the ease with which you can cross-link your information. Links in a wiki are created by typing in WikiWords. wikidPad allows you to get a better undestanding of your research and documentation and allow you to better explore and rediscover your knowledge.

With Wiki.js you can run a blazing fast Wiki built with performance in mind. Wiki.js is an extensible, free and open source Wiki software written in JavaScript. Wiki.js brings a modern approach to documentation and Wiki writing, it provides a simple to use WYSIWYG editor, a Markdown editor and a visual builder to please all types of workflows. All content moderation is also tracked on a Wiki.js-powered site, which means that you can an revert to a previous state or recover a deleted page at any time and get a broad overview of content evolution. Allowing you to visually compare two versions of the same page to see exactly what changed. Wiki.js runs on virtually any platform and is compatible with either PostgreSQL, MySQL, MariaDB, MS SQL Server or SQLite.

MediaWiki is a free and open source wiki engine used by thousands of organizations and websites across the globe. It's the software that powers Wikipedia, which was released as a free and open source project under the name MediaWiki, a year after the release of Wikipedia. The software allows people to collect and organize knowledge in cooperation with one another, and make it available on the web. MediaWiki is now built by a community of open source developers and provides plugins can be used to extend the software further. Allowing sister sites like Wiktionary, Wikimedia Commons and Wikidata to utilize the same code base.

TiddlyWiki is a personal wiki and a non-linear notebook that provides an interactive way to manipulate and structure data for web consumption. The free and open source application is written as an SPA (Single Page Application) with JavaScript by Jermolene. TiddlyWiki is designed from the ground up to easy to customize and re-shape depending on your use-case, while also providing tools that can be used to split up and reuse content.

BookStack is a free and open-source, self-hosted, easy-to-use platform for documenting, organizing and storing information. BookStack is written in PHP, on-top of the Laravel Framework and can be hosted on most web hosting platforms, VPSs and cloud instances. The software is configurable and allow you to setup BookStack for your particular user case. It allows you to change, the name, logo, theme and registration options. It also provides a page editor with a simple WYSIWYG interface that can be used to edit content by anyone. BookStack is developed as a truly free and open software and is released under the MIT license.

Nuclino is a lightweight and collaborative wiki for all your team's knowledge, docs, and notes. Nuclino can serve as your teams collective mind. It includes features like a WYSIWYG collaborative real-time editor and a visual representation of a team's knowledge in a graph. Nuclino allows you to stay connected and effective while on the go.