Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
Bitly - Get the most out of your social and online marketing efforts. Own, understand and activate your best audience through the power of the link with Bitly Enterprise.
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.
Rebrandly - Rebrandly is the easiest way to create, share and manage branded links.
Postman - The Collaboration Platform for API Development
Shorten.REST - A URL shortener API you can depend on