Blue PSD Twitter Button
Here's an nicely designed button for Twitter. Of course, it would work equally well on other sites as well. If you're just starting to learn how to use photoshop to design buttons, then this is great place to start as you'll see how layer styles are built.
50 Free Summer Vintage Icons
Here is a gorgeous set of vintage icons. If you've been waiting for the arrival of summer, then wait no more! The icons come in two different packs, one for essentials and one for summer. There is also a premium 217 version available.
The Goodies Icon Set
Get 25 beautifully designed line icons. The set includes a game controller, football, candy and more - all fun items. Available in PSD format and each icon can be resized without losing quality.