SageMath

SageMath is a free open-source mathematics software system licensed under the GPL. It builds on top of many existing open-source packages: NumPy, SciPy, matplotlib, Sympy, Maxima, GAP, FLINT, R and ma...
Language(s): Python
Operating system(s): Linux, Mac OS, Windows, Solaris, Android, iOS
License: GPLv3

Signal

Signal is a cross-platform encrypted messaging service developed by the Signal Foundation and Signal Messenger LLC. It uses the Internet to send one-to-one and group messages, which can include files,...
Language(s): N/A
Operating system(s): Android 4.4 or later, iOS 9.0 or later, Windows 7 or later (64-bit), Mac OS 10.9 or later,] Linux distributions
License: Clients: GPLv3, Server: AGPLv3

TensorFlow

TensorFlow™ is an open source software library for high performance numerical computation. Its flexible architecture allows easy deployment of computation across a variety of platforms (CPUs, GPUs, TP...
Language(s): Python, C++, CUDA
Operating system(s): Linux, macOS, Windows, Android
License: Apache 2.0 open source license

Tor

Tor is free and open-source software for enabling anonymous communication. The name is derived from an acronym for the original software project name "The Onion Router". Tor directs Internet traffic t...
Language(s): C, Python, Rust
Operating system(s): Windows, Unix, Android, Linux, Mac OS
License: BSD 3-clause license

Torch

Torch is a scientific computing framework with wide support for machine learning algorithms that puts GPUs first. It is easy to use and efficient, thanks to an easy and fast scripting language, LuaJIT...
Language(s): Lua, LuaJIT, C, CUDA and C++
Operating system(s): Linux, Android, Mac OS, iOS
License: BSD license