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ExoSee

ExoSee is a private community-oriented file-sharing program that lets people download and share files with users all over the world. It allows for both public sharing within the community and private sharing with trusted members only.

ExoSee has no central server, and thus no load on a dedicated hosting computer, and its users can choose communities. It supports its own XOC protocol that lets users post direct links off the web for downloading, where only the owner of the link knows where the file is.