16-bit PNG plug-in for Photoshop & After Effects.
SuperPNG is a free Adobe Photoshop plug-in for using PNG (ping) files. It is FASTER than Adobes own PNG plug-in and saves considerably smaller PNGs.

PNG is an open source file format that supports tight lossless compression. It can be read on any platform by most graphics applications and is fully supported by all Modern web browsers.

SuperPNG fully supports the PNG format. It includes some advanced options for saving PNGs:
16-bit color support
Variable Compression
Gamma Correction
Meta Data saving you can free download SuperPNG 1.1 now.