Twitter Icons, Facebook Buttons and other social stuff are always demanded by users and web-designers. These images are everywhere!
Here you can find some examples of such icons. Maybe they are not well designed, but at least can be used
Twitter Icon
Download free Simple Dark UI Kit
A social buttons
one for Twitter and for Facebook
A twitter icon
with some effects created with the help of Adobe Photoshop CS5
Left: Normal
Middle: Inner shadow
Right: Shiny finish
by slayerD1