3D Shadow	Makes various types of shadows..	Freeware
Adrenaline	Camouflage, Halftone(demo), Harmonix, NightVision, OldMovie(demo), Snowflakes, and SnowScape. Author VanDerLee	Freeware
Alfs Filters	Power Tools, Boarder FX and Decolorizer. Author Alfredo Mateus	Freeware
Almathera	The famous pool effect, halo, beveller and others useful effects.	Free
Andrews Filters	All 62 of them....	Freeware
Autointerlace	Creates a interlace effect like seen on tv screens..Also offered as (demos) are..Softener, Plaid Lite and Autochromatic.	Freeware
Balder Olriks Filters	20 Filters from bevel to noise to dots...	Freeware
Colorworks	by Cybia	Free
Corrective Filters	Center Weighted ND Filter, Radial Gradient Filter and Unfringe are 3 filters designed with the Filter Factory for corrective purposes. By Berthold Daum	Free
Crescent Moon	8 filters Colour Spinner, Color Switcher, Cut Glass, Terracotta, Tri Mirror Tile, Strip Tile, Fade Out, Spooky Fade, Jammin, Quilt and Warm Cloth. By Lindon Parker at Crescent Moon Software Australia. Also TwoMoons (click here)	Free
DC	Also known as Filter Meister Plugins.if you like them donate to your favorite charity. I did..	CareWare
Dragonfly Sinedots, Sinedots II	Awesome ghostly shapes and images. Check it out	Freeware
Dreamy Photo	Soft and subtle focus effects.. Requires a free serial. Just email them..	Freeware
Eliminate Black  Eliminate White	Eliminates the black or white from a photo.By, Joe Cilinceon	Freeware
Enki	5 filters effects, Fan, Wallpaper, plaid gradient, Sierpinski Laser Show, and Yellow defuse. By Enkis Lair	Free
Entrelacement	A simple blind filter ...By François Saluden	Freeware
Eyecandy 4000	One of the most used filters for PSP, famous for glow and motion trail..By Alein Skin..(demo)	Demo

Fantasy Machine Paint Engine	Paint Engine is one of the most popular free filters, though I have not personally tried it..	Freeware
Filter Factory  A to V	You may need a plugin manager to use these but you can get that there as well..	Freeware
FilterMeister Plugins	Also known as DC has really good effects ...	CareWare
Fractal Snowflake Generator	Not really a plugin but a stand alone flake generator..Useful for making brushes and tubes and various patterns...	Freeware
Funhouse 1 and 2	19 different filters. By K. McMichael	Freeware
Gravitational Lenser 1.3	A photo realistic simulator of a point mass, weak and thin gravitational lens.	Freeware
Gregs Factory Output 1 and 2	A few dozen filters with excellent effects.. By Greg Schorno	Freeware
IconShop	An icon librarian that offers the tools to manage ICL icon libraries	Free
I-Decay	Twenty filters by Icabod. The file is packed in RAR format, so you need WinRar to decompress them.	Freeware
Jama 3D	Create corrugated and cellular like patterns from 2D images. By Redfield	Freeware
Kang 1 to 4	Over 60 effects to do what you can dream..By kangaroo@asan.com	Freeware
Kiwis Filters	Strange names but great effects in a package of 10 filters. By Thomas Kiewski	Freeware
Krustys FX	They can explain it better than I can , give em a visit..	Freeware
L & K Filters	Some very nice filters...	Freeware
Lattice Composer	Produces variety of weave patterns, fabric textures, body art tattoos and skeleton simulations. By Redfield	Freeware