Volunteered Geographic Information (VGI) has redefined the practices of geospatial data collection and utilization, by promoting collaboration and democratizing access to geographic information. However, existing tools present notable limitations regarding accessibility, adaptability, and cost, restricting their use in communities and research projects with limited resources. This article presents NexusMap, an open-source tool designed for the collection, visualization, and management of collaborative geographic information. Its development has addressed key technical and methodological challenges, such as the creation of modular and scalable architecture, accessible interfaces for users without technical training, and essential functionalities such as data validation and interoperability through open geospatial standards. NexusMap is easily adaptable to different types of projects, fostering inclusive and flexible participation. The plugin was evaluated through tests conducted with undergraduate and postgraduate students, including participants with and without prior GIS experience. The results indicate a high level of acceptance: students without technical training gave an average score of 4.49 out of 5 across all items, while advanced users rated the plugin with an average of 4.25. However, feedback from advanced users highlights priority areas for improvement in future versions. These insights suggest that future updates should prioritize these aspects to enhance the tool's suitability for more demanding professional environments. The source code is available at the NexusMap GitHub repository: https://github.com/EscalaDigital/nexusmap.
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