netscan
naabu

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netscan
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Masscan: Scan the entire Internet in under 5 minutes
I wrote netscan years ago and still use it. It's pretty fast too: https://github.com/62726164/netscan
naabu
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Recommended high speed port scanner?
Naabu works best for me
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[Go] Try capturing TCP packets
fatal error: pcap.h: No such file or directory #125 - projectdiscovery/naabu - GitHub
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Naabu: a portscanning library in Go
actual link: https://github.com/projectdiscovery/naabu
What are some alternatives?
masscan_as_a_service - masscan as a service
masscan - TCP port scanner, spews SYN packets asynchronously, scanning entire Internet in under 5 minutes.
zmap - ZMap is a fast single packet network scanner designed for Internet-wide network surveys.
scilla - Information Gathering tool - DNS / Subdomains / Ports / Directories enumeration
debcvescan - Debian CVE Scanner is self-contained CVE scanner for DEBIAN distributions written in golang.
netscanner - netscanner - TCP/UDP scanner to find open or closed ports
portscan - Port scanning examples to teach Go concurrency bounding
DivideAndScan - Divide full port scan results and use it for targeted Nmap runs
zdns - Fast DNS Lookup Library and CLI Tool
RustScan - 🤖 The Modern Port Scanner 🤖
gopacket - Provides packet processing capabilities for Go
