Visual Understanding Environment (VUE) is a free, open source application for mapping concepts, ideas and digital content. It enables users to generate nodes and links, and apply a simple set of tools to explore the relationships. VUE is, in the words of its developers, an application to "integrate, organize and contextualize electronic content" in research or learning environments. Its tools include visualization, dynamic content mapping, semantic mapping, enhanced pathways and search functions.

bubbl.us is a web-based mind mapping tool, useful for organizing ideas, brainstorming, analyzing relationships, and visualizing data. Simple interface, with basic and easily understood functionality. Free to try without creating an account. Also available as an iOS application for iPad.

Free account allows creation of three mind maps, with minimal customization (e.g., text size and formatting, bubble color and hierarchy)

Expanded functionality, export options, and unlimited map creation with upgraded accounts

Monthly or annual subscription options for individual account upgrade, including 30-day free trial

Group licensing option offered for collaborative use by teams, including custom branding

Eligible teams may apply for educational discount by emailing support@bubbl.us