Icon reference for web, mobile and native apps
http://www.hicksdesign.co.uk/iconreference/
450 Free Web Application Icons: spirit20
spirit20 consists of almost 500 transparent PNGs at 20×20 pixels, and is completely free to use for both personal and commercial projects. No attribution is required.
source: http://www.webresourcesdepot.com/450-free-web-application-icons-spirit20/
Free Social Media Icons
This free set includes 50 icons of the most popular social media networks on the internet. The icons are designed in 32px and 16px vector format. With the vector format, you can scale the icon to any size to fit with your design or use it in high quality print materials. What you will get from the zip package: 32px and 16px in three different file formats: vector EPS, PNG, and GIF.
Icons include:
Delicious, Flickr, Twitter, Retweet Button, Facebook, MySpace, StumbleUpon, Digg, Slash Dot, Mixx, Skype, Technorati, Reddit, FriendFeed, YouTube, LinkedIn, Newsvine, SlideShare, Google, Google Talk, Yahoo, Yahoo Buzz, Netvibes, AOL, Microsoft, MSN, Apple, MobileMe, App Store, Amazon, Last.fm, Mister Wong, Qik, Vimeo, Viddler, Virb, Tumblr, WordPress, Blogger, Posterous, Behance Network, Design Float, Deviant Art, Design Bump, Friendster, Bebo, Squidoo, Share This, RSS, and Email.
Delicious, Flickr, Twitter, Retweet Button, Facebook, MySpace, StumbleUpon, Digg, Slash Dot, Mixx, Skype, Technorati, Reddit, FriendFeed, YouTube, LinkedIn, Newsvine, SlideShare, Google, Google Talk, Yahoo, Yahoo Buzz, Netvibes, AOL, Microsoft, MSN, Apple, MobileMe, App Store, Amazon, Last.fm, Mister Wong, Qik, Vimeo, Viddler, Virb, Tumblr, WordPress, Blogger, Posterous, Behance Network, Design Float, Deviant Art, Design Bump, Friendster, Bebo, Squidoo, Share This, RSS, and Email.
