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Signs & symbols
Smooth
Super Mono Basic
Unlock, Basic, Blue
Black
48x48
Unlock, Basic, green
Basic, Unlock, yellow
Desktop apps
Windows 7 toolbar full
search, secure, Unlock
256x256
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UI
Super Mono Stickers
Unlock, Lock
64x64
Shopping & e-commerce
Super Mono Reflection
yellow, Unlock, Lock
Mixed
Bunch of Bluish Icons
Unlock
512x512
Mac OS X style
Unlock, Blue unlock
Computer & hardware
Crystal Project
Futurosoft
32x32
Siena
Blue, Unlock
Unlock, green
Unlock, red
Unlock, security
KDE Crystal Diamond
22x22