Alternatives and similar repositories for wg21:

Users that are interested in wg21 are comparing it to the libraries listed below

• PeterSommerlad / PSsimplesafeint
  A C++20 implementation of safe (wrap around) integers following MISRA C++ rules
  ☆77Updated last year
• ThePhD / itsy_bitsy
  Bit containers, sequences, and views for everyone. 🕷️
  ☆122Updated 2 years ago
• cor3ntin / rangesnext
  ranges features for c+23 ported to C++20
  ☆77Updated 2 years ago
• rhalbersma / bit_set
  Rebooting the std::bitset franchise
  ☆44Updated last month
• jfalcou / kumi
  C++20 Compact Tuple Tools
  ☆49Updated this week
• anthonywilliams / strong_typedef
  A class template that creates a new type that is distinct from the underlying type, but convertible to and from it
  ☆111Updated last year
• ned14 / stl-header-heft
  Measures how parsing overweight the major STLs have become
  ☆57Updated 4 years ago
• kvasir-io / mpl
  Meta programming library designed for compilation speed.
  ☆170Updated 2 years ago
• Thermadiag / seq
  The seq library is a collection of original C++14 STL-like containers and related tools
  ☆88Updated 6 months ago
• hatcat / linear_algebra
  Proposed C++ standardisation for linear algebra
  ☆29Updated 6 years ago
• odinthenerd / tmp
  Boost (not yet) Tacit Meta Programming - your DSL for metaprogramming
  ☆66Updated 5 years ago
• tirimatangi / MultiArena
  Polymorphic memory resource for real-time applications.
  ☆66Updated last year
• foonathan / tiny
  low-level library for minimizing the size of your types
  ☆113Updated 5 years ago
• mattcalabrese / argot
  A C++ library that simplifies working with tuples, variants, and more through argument list generation and the ability to convert from ru…
  ☆61Updated 4 years ago
• rollbear / columnist
  ☆47Updated 7 months ago
• jfalcou / spy
  SPY - C++ Information Broker
  ☆154Updated last week
• PeterSommerlad / PSsst
  Peter Sommerlad's Simple Strong Typing
  ☆34Updated last year
• jbcoe / indirect_value
  An indirect value-type for C++
  ☆82Updated last year
• boostorg / stl_interfaces
  A C++14 and later CRTP template for defining iterators
  ☆73Updated this week
• brenoguim / flexclass
  A library for classes with flexible layout
  ☆56Updated 4 years ago
• lucteo / concore
  Core abstractions for dealing with concurrency in C++
  ☆66Updated last year
• bemanproject / beman
  Organization, documentation, etc. for the Beman Project,
  ☆83Updated last week
• jfalcou / kiwaku
  C++20 and onward collection of high performance data containers and related tools
  ☆54Updated last month
• ldionne / metabench
  A simple framework for compile-time benchmarks
  ☆183Updated 3 years ago
• rollbear / lift
  constexpr C++17 library for simplifying higher order functions in application code
  ☆198Updated last year
• qnope / Little-Type-Library
  A little metaprogramming and functional library
  ☆69Updated 2 years ago
• mpusz / fsm-variant
  Finite State Machine implementation using std::variant
  ☆88Updated 5 years ago
• ericniebler / ustdex
  a small lightweight std::execution work-alike
  ☆65Updated 3 weeks ago
• mattkretz / vir-simd
  improve the usage experience of std::simd (Parallelism TS 2)
  ☆26Updated 6 months ago
• TheLartians / StaticTypeInfo
  🏀 Up your type-game. A small C++ library for compile-time type names and type indices.
  ☆73Updated 3 years ago