Best Intercepter-NG Alternatives

Wireshark is the world's foremost network protocol analyzer. It lets you capture and interactively browse the traffic running on a computer network. It is the de facto (and often de jure) standard across many industries and educational institutions.

Ettercap is a suite for man in the middle attacks on LAN. It features sniffing of live connections, content filtering on the fly and many other interesting tricks.

Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and (with appropriate hardware) can sniff 802.11b, 802.11a, 802.11g, and 802.11n traffic.

AirSnare is another tool to add to your Wireless Intrusion Detection Toolbox. AirSnare will alert you to unfriendly MAC addresses on your network and will also alert you to DHCP requests taking place.

PCAPdroid is an android app to capture the phone traffic and analyze it remotely (e.g. via Wireshark). The traffic can be easily downloaded from a remote device thanks to the integrated HTTP server, or streamed to a remote UDP receiver.

Debookee is the simplest & most powerful network traffic analyzer for macOS.

Appknox is a mobile app security testing solution to detect and fix vulnerabilities in mobile apps using a combination of automated and manual tests.

If you're debugging on a remote machine with a large pcap and no desire to scp it back to your desktop, termshark can help!

Packet capture/Network traffic sniffer app with SSL decryption. Not that feature rich yet, but it's a powerful debugging tool especially when developing an app.

HttpCanary supports packets capture and injection. With this app, you can test your mobile Rest APIs very very easy. Besides, HttpCanary provides multiple view browsers, such as raw viewer, hex viewer, preview viewer and so on.