1)   Outliner 2.0
It gives a user the easiest way to get image contouring with desired quality. This plug-in just picks out various edges making them more expressive. ImageSkill Ouliner is FREEWARE.

 2)   IrfanView Platinum Pack Edition 4.1
Complete latest build of the world's most popular free image viewer and converter. Comes with improved set of plug-ins, including Jpeg2000 writing support, shell extension, extended image types, etc. This is all-in-one single mega pack.

 3)   IrfanView ShellExtension 1.01
IrfanView Shell Extension is a free Shell Extension Dll that adds the ability to call some IrfanView functions from within the Windows Explorer.