White Rabbit provides sub-nanosecond accuracy and picoseconds precision of synchronization for large distributed systems. It also allows for deterministic and reliable data delivery.

White Rabbit allows you to precision time-tag measured data and lets you trigger data taking in large installations while at the same time using the same network to transmit data.

• sub-nanosecond synchronization
• connecting thousands of nodes
• typical distances of 10 km between nodes
• Ethernet-based gigabit rate reliable data transfer
• fully open hardware, firmware and software
• multi-vendor commercially produced hardware

Read more in the wiki here and on GitLab. Via the Open Hardware Repository.