Deviare API Hook - Deviare is a professional open source hooking engine for instrumenting arbitrary Win32 functions, COM objects, and functions which symbols are located in program databases (PDBs).
madCodeHook - "madCodeHook" offers everything you need to hook code (mostly APIs).
EasyHook - The reinvention of Windows API Hooking
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´
RESTer - A REST client for almost any web service (Firefox and Chrome extension).