Microsoft Research Detours - Detours is a software package for re-routing Win32 APIs underneath applications.
EasyHook - The reinvention of Windows API Hooking
HookInjEx - How to inject code into another processes address space, and then execute it in the context of this process.
WinAPIOverride - WinAPIOverride : This software allows you to monitor and/or modify any function of a process for any calling convention (stdcall or cdecl)
madCodeHook - "madCodeHook" offers everything you need to hook code (mostly APIs).
Postman - The Collaboration Platform for API Development