Libvitamtp is a library based off of libmtp that does low level usb communications with the vita. it can read and recieve mtp commands that the vita sends, which are a proprietary set of commands that is based on the mtp open standard. opencma is a frontend that allows the user to transfer games, saves, and media to and from the playstation vita. it makes use of libvitamtp to communicate with the device and other libraries to intrepet the data sent and recieved. opencma is a command line tool that aims to be an open source replacement to sony's offical content management assistant.