SpeedTree is a programming package produced by Interactive Data Visualization, Inc. (IDV) that aims to produce high-quality virtual foliage and trees in real time, suitable especially for video games but also aimed to a lesser extent at some other kinds of simulations. It has so far been licensed to a substantial number of video game developers, including developers of the Unreal engine series. SpeedTree is currently being used in several games, one of which is a MMO action game World War II Online, and the renowned RPG The Elder Scrolls IV: Oblivion.

The Age of Conan engine also incorporates the SpeedTree engine to show trees and foilage.