Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.
Postman - The Collaboration Platform for API Development
WinAPIOverride - WinAPIOverride : This software allows you to monitor and/or modify any function of a process for any calling convention (stdcall or cdecl)
Insomnia REST - The most intuitive cross-platform REST API Client ð´
EasyHook - The reinvention of Windows API Hooking
soapUI - SoapUI Pro is one of the most prominent API testing platforms around, allowing developers to quickly prototype the functions of their apps and get them to market with little hassle.