Filter Effects
Here is an collection of some pre-configured filter effects for Inkscape:
A good resource anyway is the Open Clipart Library:
Do you have a lot of time? 
The development version now comes with a lot (129!!!) of pre-set filters:
Digitalize:
Dirty text:
Old parchment:
Emboss light Text and two drop shadows.
Created for webdesign elements. Download
Gel filter Download
Multicolor glas Download
(But i think it looks more like fluid, so i change the example color with the Gimp)
Negative-Filter Download
Splat Filter Download
A brushed Metal Filter with 3D look. Download
Mixed Filter Pack Download
Distortion Pack Download
Gravure (black fill) / Glas (white fill) Download
Fire: Download
Smoke: Download
Drop Shadow: Download
Emboss: Download
Melt: Download
Some Filters are still integrated as examples in your Folder:
/usr/share/inkscape/examples
So, check out the Tutorial series from Niko Kiirala. He describe the filter effects existing in Inkscape and general information about using and creating filter effects.
http://fedev.blogspot.com/2008_04_01_archive.html
or:
http://tavmjong.free.fr/INKSCAPE/MANUAL/html/Filters_0.46.html
castaway said
I downloaded one of your filters, http://openclipart.org/people/Chrisdesign/Chrisdesign_Brushed_Metal_Filter.svg
And it seems to crash any folder I put it into. I am running gnome 2.22.3 and ubuntu 8.04
Do you think it may be a gnome bug or is it just my machine?
Tx
wsnaccad said
Hello Chrisdesign,
Thanks to your distortion pack I was able to create a water filter. I just added some more filter primitives to add waves. It turned out pretty neat. It’s now in OCAL. Some more examples on its usability is in my blog (water waves and reflections on water).
I wouldn’t have done it without your great filter.