udp

Packet Sender is a free utility to allow sending and receiving TCP, UDP, and SSL (encrypted TCP) packets on the ports of your choosing.

A modbus TCP and RTU master and slave tool with import and export functionality.

A TCP, UDP, and SCTP network bandwidth measurement tool.

Network diagnostics tools for pinging, scanning, and analyzing hosts

Professional all-in-one terminal, sniffer, and protocol analyzer.

tun2socks - powered by gVisor TCP/IP stack

CLI and TUI for listing listening TCP and UDP ports

Cross-platform netcat — TCP/UDP send/receive, port checks, TLS clients.

多协议网络调试工具

See every port in use, and take one back with a click.

MNDP - Mikrotik Neighbor Discovery Protocol - Tray Application Tool

Sessionless UDP Load Balancer Application

It is a multi-threaded ICMP, Port, IP, NetBIOS/NetBT, ActiveDirectory and SNMP scanner with many advanced features.

Send a file to every machine on your LAN at once over UDP broadcast/multicast.