span lite - A C++20-like span for C++98, C++11 and later in a single-file header-only library

A migration path to C++ library extensions scope_exit, scope_fail, scope_success, unique_resource, C++ standard libraries extensions, version 3.

ring-span lite - A C++yy-like ring_span type for C++98, C++11 and later in a single-file header-only library

optional-fun lite - Functional algorithms for optional (lite) for C++98, C++11 and later in a single-file header-only library

optional lite - A C++17-like optional, a nullable object for C++98, C++11 and later in a single-file header-only library

optional bare - A simple version of a C++17-like optional for default-constructible, copyable types, for C++98 and later in a single-file header-only library

observer-ptr - An observer_ptr for C++98 and later in a single-file header-only library (Extensions for Library Fundamentals, v2, v3)

C++20's jthread for C++11 and later in a single-file header-only library (WIP).

A single-file header-only version of C++17-like invoke() for C++98, C++11 and later (WIP).

indirect_value lite – An indirect value-type for C++11 and later in a single-file header-only library (p1950)

byte lite - A C++17-like byte type for C++98, C++11 and later in a single-file header-only library

boolean lite: A strong boolean type for C++98 and later

atomic lite - a C++11 atomic operations library for C++98 and later

any lite - A C++17-like any, a type-safe container for single values of any type for C++98, C++11 and later in a single-file header-only library

A modern, C++11-native, single-file header-only, tiny framework for unit-tests, TDD and BDD (includes C++98 variant)

expected lite - C++23 expected objects for C++11 and later in a single-file header-only library

Parent of *-lite repositories, a migration path to post-C++98 library features via polyfills.

A small C++11, C++14 header-only library for compile-time dimensional analysis and unit/quantity manipulation and conversion

Note: string-bare moved to string-lite.

A blazingly fast multi-language serialization framework powered by JIT and zero-copy.

A maintained, modernized fork of Crypto++ with new algorithms and security improvements

A reflection-based approach for generating Python/Lua/JS bindings for your C++ code

Map structures to/from json

Ally - a lightweight C and C++ plugin system