Frameworks & ecosystem
The tools most C++ projects are built on.
Desktop & embedded UI
Qt
Cross-platform application framework with widgets, QML and networking.
Libraries
Boost
Peer-reviewed libraries; many (smart pointers, filesystem, optional) later entered the standard.
Games
Unreal Engine
AAA game engine scripted in C++ and Blueprints.
Web
Drogon verify
High-performance asynchronous HTTP framework.
RPC
gRPC
Protocol Buffers based RPC with first-class C++ support.
Testing
GoogleTest / Catch2
The two most common unit-testing frameworks.
Build & packages
CMake + vcpkg / Conan
De-facto build generator and package managers.
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