FreeImage is an Open Source library project for developers who would like to support popular graphics image formats like PNG, BMP, JPEG, TIFF and others as needed by today's multimedia applications. FreeImage is easy to use, fast, multithreading safe, compatible with all 32-bit versions of Windows, and cross-platform (works both with Linux and Mac OS X).
Thanks to it's ANSI C interface, FreeImage is usable in many languages including C, C++, VB, C#, Java and also in common scripting languages such as Perl, Python, PHP, TCL or Ruby.
The library comes in two versions: a binary DLL distribution that can be linked against any WIN32 C/C++ compiler and a source distribution. Workspace files for Microsoft Visual C++ 6 are provided, as well as makefiles for Linux and Mac OS X.
Release 3.4.0 is especially useful to TIFF and TARGA users. It reintroduce the LZW compression algorithm (for which the patent as expired) and also adds a new GIF plugin. This release also solves many minor bugs so that everyone should upgrade it's version to this release.
As usual, check the change log for full details :)
FreeImage can be downloaded from: http://freeimage.sourceforge.net