Appleās Aperture 2 includes a powerful plug-in architecture for the seamless integration of popular third-party image editing software.
Editing plug-ins are already available for Aperture 2.1 and include the Dfx Digital Filter Suite from the Tiffen Company and Power Stroke, Light!, and Ozone from Digital Film Tools. Plug-ins from several other developers, including Nik Software (Viveza), dvGarage (dpMatte and HDRtoner), Image Trends (Fisheye-Hemi), and PictureCode (Noise Ninja) are expected soon.
Aperture 2.1 also includes an Apple-developed plug-in, Dodge & Burn, that provides tools for making selective edits of images with Dodge (lighten), Burn (darken), Blur, Sharpen, and Saturation effects.
The free Imaging Plug-in Software Development Kit (SDK) for Aperture is now available through the Apple Developer Connection (ADC). Interested developers should visit the ADC website and download the SDK.
More information here.