Check the Pledgie page on what donation money will be for.
linanim aims to provide support for animated file formats, including APNG and GIF, on the iOS and other platforms. Currently it’s on the first stages of development and shouldn’t be used in production environments.
See it in action
The image standing still is a UIImageView while the one jumping up and down is a OpenGL texture applied to the XCode's default OpenGL template.
Read the announcement at my blog
While without too many technical details it provides some more background and insight into the project.
libanim is currently licensed under the MIT license.