20年来最好的UI设计，垦定是乔帮主带领下的苹果。自从前几次收集相关UI作品以来，本人越来越喜欢相关类似的作品了。行业内32个堪称完美的作品，均包括PSD文件下载，资源控们的好帮手。

Butterscotch UI Kit

Lion OSX UI Kit PSD

Calendar PSD

Search Drop-down PSD

Volume Slider

Mini Web UI Set

Cloudy UI kit

Dark UI Kit

Modern UI Kit

UI Bundle

Detailed UI Kit

iTunes Inspired UI Kit (PSD)

iPad Application Mockup (PSD)

Vertical Navigation Menu (PSD)

Music Player Skin (PSD)

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Free PSD Yellow Web UI Elements Kit

Mini player

Free User Interface Elements Pack

The Ultimate Wireframe UI Kit

Glossy 3D UI Kit

Got Wood? UI Design Elements

iPhone app retina

Audio player

Minimalist Dark Psd Web UI Set

Dark Grey iTunes UI

Blaubarry UI Kit

Vector UI Kit

Checkboxes