Arma 3 Tools is a complete tools suite for the Real Virtuality game engine powering Arma 3. It allows you to produce your own content for the game.
Samples of usage and work are available in the Arma 3 Samples application.Key toolsTerrain Builder
This is a terrain creation tool. It allows users to build their own virtual worlds from scratch.
Object Builder
This tool is used to create, edit and configure 3D models made for Arma 3.
Addon Builder
The purpose of this tool is to convert all data into formats readable by the Real Virtuality engine and pack them into a single archive.
Publisher
This tool can publish whole Mods onto Steam Workshop to be used in the game.
Game Updater
This application aims to improve the experience of switching between Steam branches of the game by avoiding the inconvenience of additional downloads every time you change.
Information about other tools is available in the public documentation.