iperf3: A TCP, UDP, and SCTP network bandwidth measurement tool
Cross-platform, C implementation of the IETF QUIC protocol
FreeBSD Multi PPP daemon
Robust and flexible VPN network tunnelling
Encrypted UDP based FTP with multicast
One of the most advanced DNS Proxy and DNS Firewall in one product.
Linux Server and Data-Center WAN Optimization
Pen is a load balancer for udp and tcp based protocols.
Linux game server UDP flood analyzer and protector