Ecosyste.ms: Packages
An open API service providing package, version and dependency metadata of many open source software ecosystems and registries.
vcpkg.io "callback" keyword
eventpp 0.1.3
C++ library for event dispatcher and callback list2 versions - Latest release: 7 months ago - 2 dependent repositories - 902 stars on GitHub
continuable 4.2.2
C++14 asynchronous allocation aware futures (supporting then, exception handling, coroutines and ...3 versions - Latest release: 4 months ago - 805 stars on GitHub