We just released Irrlicht version 1.7.

New features are:

• Added Multiple Render Target (MRT) support
• Added support for geometry shaders (OpenGL)
• Addes possibility to access texture mipmaps and to provide custom mipmaps
• Ogre .mesh format animations now supported, and Ogre 32bit indices as well
• NPK (Nebula device archive) support added
• New VertexManipulator interface for simple creation of vertex manipulation algorithms
• Added Separate TextureWrap modes for U and V coordinates and the option to mirror wrap
• Added Bzip2 and LZMA support and AES encryption
• Added options to 2D drawing like thickness, anti-aliasing and filtering.
• VBO Support for skydomes and similar
• Support for external windows in Mac OS X
• Lots of other improvements and bug fixes

See changes.txt in the SDK for details.
Happy downloading!