Aletheia is a cross-platform game save sync tool designed to help you easily back up and restore game saves across multiple game launchers and devices.
Supported launchers:
Heroic Games - GOG (Linux, Windows & MacOS)
Lutris (Linux)
Steam (Linux, Windows & MacOS)
GOG Galaxy (Windows & MacOS)
Xbox (Windows)
DyConnect is a cross-platform networking library for C++. Features include: synchronized variables for rapid development of networked games, multi-threaded TCP/IP, low-level UDP sockets, support for IPv4 and IPv6, and data compression.