| Library | Brief |
| C++ Language Library | Implementation for functions and classes related to the C++ Language, including base types, common utility functions, and metaprogramming templates |
| Math Library | Implementation of math functions according to the OpenGL 4.6 Shading Language Specification. Additional extensions are provided for other common math functions. |
| Memory Management Library | Implementation of functions related to memory management. |
| Containers Library | Implementation of common data structures, those that are specified in the C++ STD Library, and custom data structures that fennec uses. |