The Forge version of TreeCapitator has the ability to fell trees from other mods. Whether a particular modded tree works depends on configuration: the mod can only recognize a tree if its log and leaf blocks are registered, either through the bundled defaults, the Ore Dictionary scan, or entries you add yourself.

To improve automatic compatibility, the Forge build scans the Forge Ore Dictionary for tree-related blocks that have not been explicitly registered and adds them to TreeCapitator. For trees that are still not detected, you can add configuration entries describing their log and leaf blocks so the mod knows how to fell them.

The mod also ships with default configuration for a number of popular tree-adding mods. Documented default-supported mods include Applied Energistics, Biomes O'Plenty, DivineRPG, ExtraBiomesXL, Forestry, Gems Plus, Gravitation Suite, IndustrialCraft 2, Mekanism, MineFactory Reloaded, Natura, Railcraft, RedPower 2, Thaumcraft, Tinkers' Construct, and The Twilight Forest. Trees from mods not in this list can be enabled by adding your own config entries.