Torch

The original open-source scientific computing framework and machine learning library (LuaJIT-based), directly preceding and influencing PyTorch.

Torch is the foundational open-source scientific computing framework, initially released in 2002, built on LuaJIT. It provides a powerful N-dimensional Tensor object and a C/CUDA backend for high-speed linear algebra and GPU-accelerated deep learning algorithms. Key organizations like Facebook AI Research (FAIR) and IBM utilized this framework for early-stage AI development. The project's core architecture, focused on maximum flexibility and speed, was later ported to Python, leading directly to the creation of the widely adopted PyTorch framework in 2017.

https://torch.ch