The Greeningtheislands.net app, part of the RETOUCH NEXUS project, promotes best practices among islands serving as innovative laboratories in the fight against climate change. Acting as a virtual hub, the app connects stakeholders working to support island sustainability efforts, enabling collaboration on key issues such as energy, water, waste, and mobility. Through its discussion groups and thematic webinars, it facilitates knowledge sharing and drives forward solutions for greener, more resilient islands.