OptiPNG 0.6.3

OptiPNG: Advanced PNG Optimizer in version 0.6.3 with security updates.
OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. This program also converts external formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity checks and corrections.
If you wish to learn how PNG optimization is done, or to know about other similar tools, read the PNG-Tech article A guide to PNG optimization.

How to use: http://optipng.sourceforge.net/manual.html

Changelog: http://optipng.sourceforge.net/history.txt
Homepage: http://optipng.sourceforge.net/
more info read Related projects on the Homepage.

Version 0.6.3 18-may-2009
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+ Upgraded libpng to version 1.2.36-optipng [private]
!! Fixed a use-after-free error in the GIF reader.
(Thanks to Roy Tam for the report, and to Bryan McQuade for the fix.)
! Flushed the output log to display the current trial in real time.
This only worked on Windows in the previous version.
(Thanks to Vincent Lefevre for the fix.)
! Fixed an error in reporting unrecognized file formats.
(Thanks to [LaughingMan] for the report.)
- Removed the requirement to "fix" TIFF files that contain unrecognized
metadata. (Thanks to Piotr Bandurski for the suggestion.)
* Simplified the option abbreviation rules. Option names can now be
abbreviated to their shortest unique prefix, as in X11 applications.

Downloads:

Program exe and Source code downloads: http://sourceforge.net/project/showfiles.php?group_id=151404&package_id=167423 - no problem by compiling with vs2008 and 2010 = optipng-0.6.3-src + exe vs2008.rar


Plugin dll for paint.net [outdated]
November 30 - updated to OptiPNG 0.62, some minor changes
http://paintdotnet.forumer.com/viewtopic.php?f=16&t=20637

A must have to optimize and reduce file sizes for saving png images not only for website developers also for program authors which code png images into there programs!