There are 2 repositories under trampoline-hooking topic.
EasyWinHax is a C++ library designed to provide basic and low abstraction functionallity for windows process hacking and more specifically game hacking.
Hooking library using Valve's GameOverlayRenderer
HookPlusPlus is a lightweight 2-file C++ library for hooking in Windows-based systems, licensed under GPL v3.0.
Code Injection + Hooking sample