Flat design has become a standard in the design community, and now the first evolution has emerged which is known as long shadow. I'm not sure if long shadow is here to stay or not, but it's definitely a cool idea. Below you'll find my roundup of the best free long shadow flat icons on the web today. Also, if you would like to create some icons of your own, here is a great long shadow generator. Enjoy!
1. Social Icons
6. Social Media Icons Long Shadow, Free PSD (No Longer Available)