History: Open Source Icons

We need to get rid of some closed source and ugly icons and choose/create some consistent iconset for Admin panels and other icons.
For example, this icon:

(http://themes.tikiwiki.org/https://themes.tiki.org/show_image.php?id=55)
It seems to be an icon taken from WindowsXP and converted to gif which brings licensing issue.

Preferred format should be indexed (max. 256 colors) or alpha transparent PNGs with background colour set to white (when alpha it renders with white background in MSIE, instead some ugly grey or black background). Also when PNG is in indexed palette of same colour amount it gives better compression results than traditional GIF.

Freely Available Iconsets (must be LGPL or compatible to be shipped with Tiki)

Crystal Clear by Everaldo

http://www.kde-look.org/content/show.php?content=25668
License: LGPL
See also: http://commons.wikimedia.org/w/index.php?title=Category:Crystal_Clear_icons

Icons for Tiki by G. Ferreira

http://tikiwiki.org/gferreira_IconsTikiwiki
License: Unknown

Nuvola by David Vignoni

http://www.kde-look.org/content/show.php?content=5358
License: LGPL
Pros: very professionaly done
Cons: someone may find them too colourful (candy)

Tango Iconset

http://tango.freedesktop.org/Tango_Icon_Gallery
License: Creative Commons Attribution Share-Alike license

Mark James - Silk Icons

http://www.famfamfam.com/
License: Creative Commons Attribution 2.5 License

Monochrome Icons

http://www.kde-look.org/content/show.php?content=18317
License: LGPL
Pros: very accessible, could be used together with gferreira icons
Cons: someone may find them ugly
Note: Coloured version is called "Primary" and can be found here:
http://www.kde-look.org/content/show.php?content=39469

Glaze Icons

http://www.kde-look.org/content/show.php?content=23966
License: LGPL

Jini Iconset

mose found some LGPLed iconset on art.gnome.org too, which is called Jini (?)

game-icons.net

http://game-icons.net/

Font Awesome

The iconic font designed for use with Twitter Bootstrap
http://fortawesome.github.com/Font-Awesome/

Iconic

Iconic is an open source icon set consisting of 171 marks in raster, vector and font formats.

See Also

http://tiki.org/tiki-directory_browse.php?parent=103
http://tiki.org/tiki-index.php?page=IconReview

Resources

Icon Naming Specification

Icon set listings

http://linux.softpedia.com/get/Desktop-Environment/Icons/
http://www.maxpower.ca/free-icons/2006/03/05/
http://www.fiftyfoureleven.com/resources/icons
http://commons.wikimedia.org/wiki/Category:Icons_themes