PNG MORE
Business & finance
Pixel
24x24 Free Pixel Icons
Chat, messages, Messenger
SteelBlue
24x24
forum, Social, talk
Black
Messenger, Message, Chat
PNG ICO ICNS MORE
Network & communications
16x16 Free Application Icons
Message, mark, support
DodgerBlue
16x16
speech, Message, Messenger
Chat, Message, messages
CornflowerBlue
Computer & hardware
Strabo
lines, Bubble
OliveDrab
Bubble
YellowGreen
Bubble, speech
UI
Windows 8 Pack (Metro Style)
speech, Bubble
DarkSlateGray
26x26
Mixed
Koloria icons pack
base, Comment, Bubble
SkyBlue
32x32
32px Mantra
twitter, Blue, Bubble
DarkGray
Bubble, twitter, purple
Desktop apps
22 e107-Bubbles
Admin, talk, delete
DarkRed
30x30
Led Icons
speech, Comment, Bubble
Vaga
talk, Bubble, Comment
LightSlateGray
Twotiny
Chat, talk, quote
Lavender
12x12