C++14 compatible observer pattern / signal slot pattern that can ignore extra parameters like Qt's signals and slots.

Signals & Slots implementation in Common Lisp

An implementation of the observer pattern by c++11

Arduino Signal and Slot library ( >= C++11), compatible with any C++ project (not limited to Arduino)

Simple sigslot library for golang

A plus version of sigslot forked from https://sourceforge.net/projects/sigslot/

a replacement for Qt's signal-slot system