Apps similar to Nethor include Pcapviz, which is free and open source. Other options are PcapXray and kamene. In total there are three apps like Nethor for Mac, Windows, Linux and Chrome OS.
A Network Forensics Tool - To visualize a Packet Capture offline as a Network Diagram including device identification, highlight important communication and file extraction.
Network packet and pcap file crafting/sniffing/manipulation/visualization security tool. Originally forked from scapy in 2015 and providing python3 compatibility since then.
