PNG ICO ICNS MORE
Web Design
Human, Alert, Business
DarkSlateGray
32x32
PNG ICO MORE
Crystal Clear Actions
Alert, wrong, warning
256x256
Dark Glass
save, Disk, Error
128x128
PNG SVG MORE
Network & communications
Glyph
Cloud Computing
rejected, Cloud computing, sign
512x512
UI
Windows 8 metro style
Error
PNG MORE
Business & finance
24x24 Free Application Icons
Attack, Error, Alert
24x24
Windows 8 icons
26x26
3D
Momentum Matte icons
Bar, chart, Error
Console, Error
Error, curvechart
Desktop, Error
Mixed
Momentum Glossy icons
Laptop, Error
speaker, Error
Pixel
Windows 8 Pack (Metro Style)
Handdrawn
Hand Drawn Web Icon Set
photo, Error
Computer & hardware
Human o2
kmixdocked, Error
Smooth
Crystal Project
Error, kmixdocked
Photography & graphic design
Fugue Icons
cross, Circle, Error
16x16
Nuvola
48x48
Nuove
Silk
Error, film
Link, Error