New version of Imaging was released few days ago. Support for quite a few new image
file formats was added and many bugs were fixed.

Current Imaging info and features:
Imaging is native Object Pascal cross platform image loading, saving and
manipulation library. Main development language is Object Pascal (Delphi, Kylix and Free Pascal compilers are supported) and there are interfaces to the library (compiled into dll/so) for other languages like C/C++ and Delphi.NET. Currently supported operating systems are Windows, Linux, FreeBSD (and some other Unixes), DOS (and .NET using unmanaged DLL). Supported CPU architectures are x86 and AMD64.
Currently supported image file formats are: (loading and saving) PNG, JPEG, DDS, TGA, MNG, JNG, BMP, JPEG2000, PGM, PPM, PAM, PFM (loading only) PCX, and PBM.
Many internal image data formats are supported: 8/16/24/32/48/64 bit RGB and ARGB formats, indexed formats, grayscale formats, half/single precision floating point formats, and compressed formats DXT1, DXT3, and DXT5.
Additionally there are extensions for creating SDL surfaces, OpenGL and D3D9 textures, VCL/LCL TGraphic descendants, canvas class, and more.

Imaging homepage: http://imaginglib.sourceforge.net