Open source cpp20 projects
Every project in the registry tagged cpp20, ranked by real GitHub adoption.
Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more
The AI-native database built for LLM applications, providing incredibly fast hybrid search of dense vector, sparse vector, tensor (multi-vector), and full-text.
Hierarchical spreadsheet: a free-form data organizer that replaces outliners, mind maps and spreadsheets.
Ultra-low-latency asynchronous C++17 logging and metrics library for performance-critical applications
U++ is a C++ cross-platform rapid application development framework focused on programmer's productivity. It includes a set of libraries (GUI, SQL, Network etc.
A bleeding-edge, lock-free, wait-free, continuation-stealing tasking library built on C++20's coroutines
Rythe is a data-oriented C++20 game engine built to make optimal use of modern hardware.
Related tags
Frequently asked questions
How many open source cpp20 projects are there?
This registry tracks 7 projects tagged cpp20, with 26,689 GitHub stars between them. The most-adopted is entt at 13,239 stars.
Are these cpp20 projects free to use?
Yes — 7 of the 7 carry an explicit open-source licence across 5 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which cpp20 project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these cpp20 projects still maintained?
6 of the 7 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.