Dafont.com is a long cherished resource for fonts, including dingbats. I recommend checking out their stuff. You can use this in documents, as vector stock as a basis for your own art, you can put them into prototypes and mockups.
Please watch out for contributors who just vectorized trademarked logos and characters and such. These fonts are not actually for commercial use, even though they might be labelled “100% free”. They contain graphic material which is not own by the font creator, so the font creator can grant you no rights for them.
Check out their library here: http://www.dafont.com/mtheme.php?id=7&l=10&l=1
Please make sure you are filtering for 100% free stuff, so everybody is happy with commercial use.
Gestureworks provides frameworks for gesture controls on games, devices and interactive installations. They also created a huge set of complex gesture illustrations, ideal for game design documents, manuals or clear communication about complex control patterns.
You can get the illustrations and vector shapes here (creative commons license): http://gestureworks.com/icons-fonts
They also granted dafont.com the opportunity to host a dingbats font with all the gestures with a completely free to use license here: http://www.dafont.com/gesture-glyphs.font?l=10&l=1 …handy!