There are 61 repositories under header-only topic.
A C++ header-only HTTP/HTTPS server and client library
A single-header ANSI C immediate mode cross-platform GUI library
Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code
A curated list of awesome header-only C++ libraries
Compile Time Regular Expression in C++
Activity Indicators for Modern C++
Portable, simple and extensible C++ logging library
Functional Programming Library for C++. Write concise and readable C++ code.
The missing CMake project initializer
C++ compile-time enum to string, iteration, in a single header file
library for importing functions from dlls in a hidden, reverse engineer unfriendly way
Header-only TOML config file parser and serializer for C++17.
Fast & memory efficient hashtable based on robin hood hashing for C++11/14/17/20