iPresentee has released for free Keynote Objects, a package of images suitable for use in Apple Keynote, iWeb and Pages documents. The package includes 100 images.
The background of all Keynote Objects is transparent, so they can be used on any colored background. You can resize, rotate, increase or decrease the opacity of the image, fit it with shadows or overlap them.
Keynote Objects are also compatible with Microsoft PowerPoint and Word documents.