NodeXL is a free, open source tool for generating and exploring network graphs from Microsoft Excel files. It is particularly suited to data from social media sources, and includes the ability to directly import data from Twitter, YouTube, Flickr and email, with additional plugins available for gathering data from Facebook, Microsoft Exchange, wikis and URLs. The tool generates visualizations that can be adjusted, zoomed and filtered, with additional features for vertex grouping, graphing metric calculations, and automating tasks. NodeXL can both import and export data in GraphML, Pajek, UCINet and matrix formats.

WikiPack is a web based personal information organizer and Markdown editor that uses Dropbox for synced storage. Using plain text Markdown files and WikiWords, WikiPack gives information context and links entries together by turning your Markdown pages into a private, password protected wiki. The easy to use Markdown language lets you create and edit your wiki pages without having to learn complex wiki syntax. WikiPack features page history/versioning and visual change comparisons in the browser-based GUI and store all of your files in your Dropbox account.

You can import existing markdown files to sync WikiPack with other apps and services using Dropbox, or use the quick-start template to set up new wikis.

WikiPack includes a GUI markdown editor with syntax highlighting, built-in markdown reference, support for Multimarkdown table, and toolbar buttons with keyboard shortcuts and tools for common formatting. WikiPack works in the browser so you can use it on any desktop or mobile device that has an internet connection and Dropbox functionality.

WikiMindMap is a mindmapping tool that allows you to browse in wiki content. It uses an interactive interface based on a system of nodes and brackets. Maps may be exported into FreeMind.

TiddlyWiki is a reusable personal web notebook. It allows anyone to create personal hypertext documents that can be published on the Web, and also search and tag content. The developers write, "TiddlyWiki is designed to be non-linear, structuring content with stories, tags, hyperlinks, and other features. You can organise and retrieve your notes in ways that conform to your personal thought patterns, rather than feel chained to one preset organisational structure. You can use TiddlyWiki as a single file that you view and edit through any web browser, whether you are online or offline. Or you can use it as a powerful Node.js application that stores each of your notes as a separate file."

MediaWiki is a free software open source wiki package written in PHP, originally for use on Wikipedia and other Wikimedia Foundation projects. It is designed to be run on a large server farm for a website that gets millions of hits per day.

1) The user uploads a .csv file of data points and their locations.

2) A group of users all add their own data location points to the map, on their own time from their own devices.

Each point can include text, video, image, or audio annotations.

Basic functionality is free; larger uploads and large numbers of maps require a paid subscription.

Confluence is enterprise wiki software, available either for installation on a local server or via cloud hosting. Open source projects can request a free license. Confluence integrates with other Atlassian products like JIRA.