TreeCapitator is a simple mod that when an axe is used on a vanilla tree, all connected wood blocks and leaf blocks of the same type of tree fall. Sapplings and apples will drop with the same chances as if you broke the leaves themselves. It does not currently work on Forestry trees or some other custom trees for that matter, as compatibility with Thaumcraft was removed in Minecraft 1.0

It does work on trees from the Biome generating mods such as biomes'o'pleanty & ExtrabiomesXL. Although the mod some times can not register a whole huge tree (fir & sequoia) but will work from half way up the tree. Using the mod on these huge trees will cause lag in world for the mass amount of entities being droped all at the same time.