PNG MORE
UI
Pixel
Bijou
reply
Black
10x10
Windows 8 Pack (Metro Style)
DarkSlateGray
26x26
PNG ICO ICNS MORE
Fugue Icons
reply, mail
Indigo
16x16
mail, All, reply
WooFunction Icon set
Email, reply
Silver
32x32
Email, reply, All
Gainsboro
Sweetie Web Communication
24x24
BWPX
reply, Comment
18x18
Gnome icons
All, mail, reply
Gray
mail, reply, Sender
Tango
Sender, mail, reply
mail, reply, All
WhiteSmoke