PNG ICO ICNS MORE
Network & communications
Pixel
16x16 Free Application Icons
help, mark, Book
DodgerBlue
16x16
help, to, mark
SteelBlue
about, help, mark
Message, mark, support
support, mark, help
question, mark, help
Black
PNG MORE
Files & folders
ExplodingBoy Pixel Icons
question
LightGray
20x20
Coral
CornflowerBlue
Family & home
IconBeast Lite
30x30
UI
Windows 8 Pack (Metro Style)
DarkSlateGray
26x26
Fugue Icons
question, Book
question, Cursor
button, question
RoyalBlue
question, frame, octagon
question, octagon
White, question
question, White
question, Silhouette, user
Desktop apps
Sizicons
Blue, question
Gray
Mixed
Gloss set: Basic
question, Faq, about
32x32
PowderBlue
Shrunk Pidgin Smilies
Khaki
24x24
frame, about, question