For all icon sets see commons:Category:Icons themes.
Exquisite is a part of the Xp_Mad icon set created byMimin Ladha.
GNOME Desktop icons
This is subset of GNOME Desktop icons.
Project Nuvola 2.0+ contains interesting flag icons, but also some other icons.
Crystal Clear icons
- Vista-folder images.png
There are couple of interesting pages with emoticons or smilies. Those are: Category Smilies, Wikipedia Emoticons & Category Emoticons. Some of them are part of other icon sets (Tango, Gnome, Crystal Clear or SMirC), some of them are small 22px png images, some are large png and there are svg icons, but in total about 300 images.
The end. Go back.