Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations. It uses C++ language.
Unity Game engine: A multi platform game development tool with customizable and easy to use editor, graphical pipelines to DirectX and OpenGL, advanced physics engine, 3D … It uses C# language.
Amazon Lumberyard is a free, cross-platform, 3D game engine for you to create the highest-quality games, connect your games to the vast compute and storage.
Cry Engine: gives you access to full engine source code. You Pay What You Want for it.
Texture and Graphics
GameTextures: A Stunning Library of Ready-To-Use Video Game Materials & Substances
Allegorithmic develops the new generation of 3D painting and texturing software: Substance Painter, Substance Designer and Substance B2M.
quixel.se: Used in virtually every major game franchise art pipeline, Quixel Suite 2 is the easiest to use texturing toolset to date, enabling you to vastly speed up your.
Dimensiva is a place of premium 3d resources, where you can find just free 3d models, offered to designers, architects and archviz enthusiasts.
Making 3D Model
Blender: Home of the open source 3D graphics and animation software. Official Blender downloads, galleries, conferences, tutorials, and links.
Maya: Comprehensive 3D animation software. Maya is 3D computer animation software with powerful modelling, rendering, simulation, texturing and animation tools for vfx artists, modellers and animators.
ZBrush: Find ZBrush Retailers, and stores that offer product sales, pricing and purchase.
99Sounds is an indie sound design label providing royalty free sound effects and sample libraries for audio and video production.