Acorn 是 Mac OS X 上的一款图形编辑工具，主要的应用是图片的特效处理，注重趣味性，并且保持易用、简洁的特性，怎么看都有点像 iLife 系列软件。最新版本为 1.0.1，更新如下：

- Take screenshots using Acorn and edit them right away.
- Chain together image filters to create stunning effects.
- Layer based image editing, an industry standard.
- Make new images and layers using your built-in iSight.
- Easy image and canvas resizing, just by changing the size of your window.
- Take advantage of every pixel of your monitor with full screen image editing.
- Tablet sensitive for pressure strokes and using the tablet's eraser.
- Vector shape and text layers.
- Freeform, elliptical, rectangular, and magic wand selections.
- Gradients.
- Create and apply custom text styles.
- Control opacity and blending modes for each layer.
- Write plugins using the Python scripting language, as well as in Objective-C.
- GPU powered. The same graphics card that makes your gaming experience smooth, helps Acorn fly through the toughest of graphics operations

该软件为商业软件，零售价为 39.95 美元，适用于 Mac OS X 10.4.9 及以上版本。

下载：flyingmeat.com/download/Acorn.zip