Description: OpenStreetMap is a free, open-source, crowd-sourced map of the world. Volunteers collect map data using GPS devices, aerial imagery, local knowledge, and other free sources to create and update the map database.
Type: software
Pricing: Open Source
Description: Wikipanion is a free browser extension that enhances Wikipedia by providing additional context and references. It adds tooltips with summaries from other sites, related videos and images, and citations.
Type: software