bueno aca les traigos enlaces muy bueno donde podras descargas iconos y PNGs para tus proyectos de todo tipo 
Pinvoke – Fugue Icons
Sweetie – Web Communication v.1
Sweetie – Base Pack v.3
Random Jabber – Sizcons
Fast Icon – Circle Social Bookmark Icons
twothirty – twotiny
ExplodingBoy – Pixel Icons
Ndesign Studio – Mini Pixel Icons
Sryo – Minimal Icons
Markup – Free Icons (9 free sets)
Fast Icon – Smashing Feed Icons
Fast Icon – Web 2 Icons
Fast Icon – Feeds Icons
Fast Icon – 3D Rss Feeds Icon
graphicPUSH – Icon Pack
SOME RANDOM DUDE – Bitcons
Feed Icons – Home of the Standard Web Feed Icon
Ganato – 24 Free Icon Packs
Free Icon Web – 11 Free Icon Sets
DryIcons – Stickers Icon Set
famfamfam – Silk Icons
Brand Spanking New – Free Mini Icons
DryIcons – Blossom Icon Set
DryIcons – WYSIWYG Sapphire Icon Set
DryIcons – WYSIWYG Classic Icon Set
Matt Ball – Developer Icons
Monofactor – Free Vector Icon Set 1
famfamfam – Mini Icons
Ten by Twenty – Vaga
sone-pl – Light Icons
We Function – Function Icon Set
lopagof – Facebook UI Icons
taytel – ORB Icons
Blog Perfume – Free Glossy Blogging Icon Set
Design Freak – RSS Icon Campaign – 10 Amazing RSS Icon Sets
chris.ivarson – Free Icons (7 Free Sets)
Mayosoft – Email Me
WebFruits Blog – Social Web Buttons – Set 1
DryIcons – Sketchy Paper Icon Set
Free Icon Download – Free web development icons #4
Zeusbox Studio – Feed Icons
Vikiworks Studio – Social Bookmark Iconset
Vikiworks Studio – Social Bookmark Iconset: Part II
liquidicity – 77 Vector Buttons hot off the press.
kurumizawa – Free web development icons
kurumizawa – Free web 2.0 RSS icons
xlphs – WIP: Web Iconset
WebFruits Blog – Social Web Buttons – Set 2
Icojoy – BacktoPixel
Icojoy – Free web development icons #1
Icojoy – Free web development icons #2
Icojoy – Free web development icons #3
Icojoy – Free web 2.0 RSS icons
AODdesign – Social Networking Icons
