An infographics about all shortcuts within Adobe's Creative Suite
iPhone free UI set - follow the link and you can download the source files, too.
20 Fantastic Examples of Flat UI Design In Apps
Windows phone UI
I think I'm going to like Windows 8
Love the simplicity of this task manager. This could/should tie in nicely with a calendar app.
HTML cheatsheet. It's like a bible!!! This is totally going to come in handy at work--print please.
'MOD' CRM system | Designer: Alexander Zhestkov
Flat UI Pack for Apps - Build Apps. Beautifully by Rebirth Pixel, via Behance