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Desktop apps
3D
Free Social Media Icons
light, bulb, Info
CornflowerBlue
512x512
speech, about, Bubble
DodgerBlue
Business & finance
E-commerce & business icons
Idea
Black
256x256
Photography & graphic design
This is Art 2
webdesign, tips, Idea
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Vector icon set
Idea, light, lightbulb
DarkGray
126x126
Files & folders
Snow Sabre Silver
Idea, Folder
Gray
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UI
Gnome Web Icons
bulb, Idea, light
64x64
Mixed
Shine 7
light, Idea, bulb
400x400
Seven General Icons
Light bulb, Idea
Sunny day General Icons
Network & communications
BeOS
jabber, lightbulb, Idea
128x128
Free Applications Icons
Electric, shock, Energy
24x24
Computer & hardware
Human o2
Idea, lamp, light
light, bulb, Idea
Idea, Light bulb, tip
Khaki
lightbulb, Idea, power
Flavour Extended
brainstorming, Idea, Brainstorm
DarkSlateGray
48x48
Idea, lightbulb
LemonChiffon
Dark Glass
bulb, light, Idea
Yellow
Nuove
Crystal Clear
tip, Light bulb, Idea
Orange
Gold
22x22