DeepMind (Google's AI)

DeepMind

Excerpted from DeepMind website:

DeepMind's scientific mission is to push the boundaries of AI, developing systems that can learn to solve any complex problem without needing to be taught how. To achieve this, we work from the premise that AI needs to be general. Agents should operate across a wide range of tasks and be able to automatically adapt to changing circumstances. That is, they should not be pre-programmed, but rather, able to learn automatically from their raw inputs and reward signals from the environment. There are two parts to this research program: (1)  designing ever-more intelligent agents capable of more-and-more sophisticated cognitive skills, and (2) building increasingly complex environments where agents can be trained and evaluated.

Train AI agents through gamelogic
Open source, GNU GPL v.2 licensing (free for private / commercial use, with GNU GPL rights clause)
Available on GitHub

OpenAI Gym Beta

OpenAI Gym Beta (article)

Excerpted from the OpenAI website:

We're releasing the public beta of OpenAI Gym, a toolkit for developing and comparing reinforcement learning (RL) algorithms. It consists of a growing suite of environments (from simulated robots to Atari games), and a site for comparing and reproducing results.

OpenAI Gym is compatible with algorithms written in any framework, such as Tensorflow and Theano. The environments are written in Python, but we'll soon make them easy to use from any language. We originally built OpenAI Gym as a tool to accelerate our own RL research. We hope it will be just as useful for the broader community.

Open source, MIT license (free for private / commercial use with MIT license inclusion)
Available on GitHub

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NOTE: unlike other FOSS spotlights, this software is in public beta.

Excerpted from the OpenAI website:

OpenAI is a non-profit artificial intelligence research company. Our mission is to build safe AI, and ensure AI's benefits are as widely and evenly distributed as possible.

In the short term, we're building on recent advances in AI research and working towards the next set of breakthroughs. Please direct press inquiries to Jack Clark at press@openai.com.

Ren'Py

Ren'Py

Excerpt from Ren'Py website:

Ren'Py is a visual novel engine – used by hundreds of creators from around the world – that helps you use words, images, and sounds to tell interactive stories that run on computers and mobile devices. These can be both visual novels and life simulation games. The easy to learn script language allows anyone to efficiently write large visual novels, while its Python scripting is enough for complex simulation games.

Ren'Py is open source and free for commercial use.

LibreOffice

LibreOffice

Writer, Calc, Impress, Draw, Base, Math, Charts

Open source, free, downloads include a portable app.
Forked from Apache Open Office.
One key difference is that LibreOffice allows users to embed fonts into documents. If this is an important feature for you, then LbreOffice is it.