Ulead WebUtilites   
PhotoImpact
Image editor for both image editing and Web page creation.
FX Razor
Special effects plug-ins for designing Web graphics.
JavaRazor
Create interactive Java applets without having to know how to program Java code
Screen Capture
Tool for grabbing screen shots right to your desktop.
Ulead SmartSaver Pro
For image and animation optimization.
Ulead GIF Animator
Create animations
Ulead COOL 3D
Free demo available
Ulead Photo Explorer
Free utility
Art Texture. Plugin
Free plugin

VanDerLee  
Adrenaline  
Old Movie
Free demo available
For making new images look old
Harmonix
Free plugin
Generates harmonic frequency waveforms
Camouflage
Free plugin
Create any type of camouflage texture
Halftone
Transform your source images in a halftone dithering pattern.
NightVision
Free plugin
Create completely realistic army night-goggle type images
SnowScape
Free plugin
Create layers of snow, dirt, gooey, slimy stuff, blood and similar effects on (semi-)transparent images.

Ultra Fractal 
Free demo available
Tool for creating fractal art

Want to know about creating creating fractal art? 
Amazing Seattle Fractals has a Fractal Art Tutorial

Check out this list of Fractal Generators at Third.Apex.to.Fractopia

Unplugged  
Free filters
Set of nearly 100 filters divided into four categories 
Colors, Effects, Shapes, Tools

Visual Manipulation   
Great set of filters, unfortunately, last I knew they were no longer available from the author.
VM Distortion, VM Experimental, VM Extravaganza, 
VM  Instant Art, VM Natural, VM Toolbox

Moon's Designs offers the VM filters for download with this tutorial.

Vizros Plug-ins   
Trial demo
Plug-ins that provide you with an interactive environment to make real 3D page-wrapping effect.
Fold. Twist and Curl