NitroShare
Network file transfer application for Windows, OS X, & Linux
...The application uses broadcast discovery to find other devices on the local network with NitroShare installed. NitroShare is built to take advantage of fast networks, easily achieving gigabit speeds on capable hardware. NitroShare runs on Windows, macOS, and Linux. Files can easily be transferred between machines running different operating systems. NitroShare is written in modern C++ and makes use of the excellent Qt Framework. All of the source code for the application is released under the MIT license.