PNG SVG MORE
Mixed
Glyph
Material Core
history
Black
487x512
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Outline
World Issues
wall clock, Clock, Schedule
512x512
Octicons
448x512
PNG ICO MORE
Education & science
Handdrawn
Brainy Icons Free — 36 Science and Education Icons
sheepskin, education, Message
64x64
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Halloween
Photorealistic
Desktop Halloween
bogey, phantasm, flight
256x256
Business & finance
48x48 Free Time Icons
minute, date, timer
48x48
history, hour, Clock
stopwatch, watch, hour
time, timer, modify
wall, hour, watch
hour, watch, minute
watch, Clock, history
timer, stopwatch, watch
minute, watch, time
minute, timer, hour
SEO & web
Metro Uinvert Dock
IcoMoon
32x32
Desktop apps
Smooth
Farm-fresh
history, Clock, frame
UI
3D
Gloss Basic Icons
history, delete
delete, history
history, Add