Computer application messaging software for mobile phones, portable media players, handheld computers and related mobile devices, namely, software that allows users to communicate with each other, message between buyers of printable 3D models and 3D printing services and the sellers who list aforementioned services for sale, and solicit each other to perform a range of printable 3D modeling and 3D printing services; Computer application software for mobile phones, portable media players, handheld computers and related mobile devices, namely, software that allows users to plan, announce, invite others to attend and evaluate real world meetings and events, manage, organize and share printable 3D models, pictures, and other digital data, list available 3D models, facilitate the sale of goods and services to others via the Internet, provide reviews and feedback about buyers and sellers of printable 3D models and 3D printing services such as cost and prices of sellers' goods and services, buyers' and sellers' efficiency, delivery, and overall shopping experience, make and receive payments for goods and services, access information and listings of peer-to-peer 3D printing service, and engage in social networking