Freesound.org is a collaborative platform for sharing and exploring sounds. It was founded in 2005 and is maintained by the Music Technology Group at Universitat Pompeu Fabra in Barcelona. The website hosts a diverse collection of sounds that can be downloaded, remixed, and used for creative purposes. The sounds are uploaded by users from all over the world and are categorized by tags, allowing easy search and navigation. Freesound.org also provides tools for sound analysis, visualization, and processing, as well as an active community of sound enthusiasts who share their knowledge, techniques, and projects. The website is free and open-source, and invites contributions from anyone interested in the world of sound.