Top 3 C++ Matrix Projects

Forscape

20 54 5.3 C++

Scientific computing language

Project mention: Why Wolfram uses square brackets for function calls | /r/ProgrammingLanguages | 2023-07-14

And if you like mathematical languages, you should check out Forscape :)

vec-mat-comp-quat

3 17 1.8 C++

C++ 2d/3d/4d Vector, 2x2/3x3/4x4 Matrix, Complex Number, Quaternion, and 3d Transformation Classes / Functions (Header Only libraries)
WorkOS

workos.com sponsored

The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
dsga

2 6 7.7 C++

C++20 library that mostly implements the vector and matrix data structures from GLSL Spec 4.6

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).