An organizer, intended for use in managing mobile device cables, has a main body made of elastomeric material and a weight contained in a weight cavity. The main body is flexible but comparatively less dense than the weight. The main body has end channels and, in many versions, cable channels. The cable channels have a smaller cross section than the end channels. In some versions, advantageously placing the cable channels helps make it easier to open up the end channels to accommodate a mobile device or various attachments.