... I send out a list of most interesting libraries and apps in the "Go" section to about 1100 subscribers.
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CLI to Test Internet Speed using speedtest.net
UDP test helpers for Go (golang)
Simple network namespace handling for go.
Simulating shitty network connections so you can build better systems.
Ethr is a Network Performance Measurement Tool for TCP, UDP & HTTP.
NFF-Go -Network Function Framework for GO (former YANFF)
goben is a golang tool to measure TCP/UDP transport layer throughput between hosts.