Mac Os X Lion Logo — Gray

1600 × 900

Apple and Linux penguin

1280 × 1024

OS Logos in Gear

1920 × 1080

Windows 7 Logo — Black, Minimalist, Digital Art, Text, Number

1500 × 1200

Windows 7 Logo — Black, Minimalist, Digital Art, Blue

1920 × 1080

Windows 7 Logo — Purple, Dramatic, Digital Art, Black

1920 × 1080

Windows 7 Logo — Black, Dramatic, Digital Art, Text, Silver

1920 × 1200

Windows 7 Logo — Blue, Modern, Digital Art, Number 7, Text

2560 × 1600

Windows 7 Logo — Black, Dramatic, Digital Art, Text, Blue

1920 × 1080

Ubuntu Logo — Blue, Neutral, Digital Art

1440 × 900

Windows Logo on Green — Minimalist, Digital Art

1920 × 1200

Penguin with Text

1280 × 1024