Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
tcpdump - tcpdump is a common packet analyzer that runs under the command line.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
netcat - Netcat is a featured networking utility which reads and writes data across network connections...
Plivo - Plivo simplifies your customer engagement.