iPhoneSketch (FastIcon): 4 free icons of iPhone, designed in scribbled style, for Linux, Mac OS and Windows. The FastIcon-agreement permits you to use the icons in printed materials, commercial projects, software application, websites, blogs, designs, themes or GUI. However, the author requires an operable link to the source.
iPhone icons (FastIcon): Browser, calendar, calculator, chat, clock, graphics, iPod, e-Mail, map, notes, phone, photo, sms, tools, wallpapers, weather.
Smiley Development Kit: available in .psd (Adobe Photoshop) format.
Flag Button Development Kit: it’s basically a Photoshop file with placeholders. To create a new button, just duplicate a layer group and paste the new flag into the respective layer. It’s as simple as that.
YellowIcon Crystal Set (1500 icons, 22 Mb) and dozens of further icon sets. Sizes: 128×128, 16×16, 22×22, 32×32, 48×48 and 64×64. By Everaldo Coelho.
OpenPhone Pack contains 12 high quality (256×256 pixels) icons; PNG and ICO formats. Licensed under GNU Public License.
Mac OS Boxes: realistic looking white boxes (Mac OS only). Free for personal use.
Iconshock’s Icon Sets (7 icon sets) include Consoles Vista icons, Red Hot Chili Icons, Elm Nightmare Street Icons, NBA Web Icons, Disk Jockey Icons, Filming Vista icons and more.
RSS Feed (Fasticon): designed in 3D-look.
Adobe CS 3 Icon Pack: nine 256×256 png icons
mAqua ChronoSync: free for personal use only.
Aqua Neue (Graphite): 86 icons, a new set of system replacement icons in Aqua style.
The iconset below includes 94 pieces and was designed by the graphic artist Jonas Rask from Denmark. The 32×32-icons can be downloaded in a .zip-archive as .ico, .png, .tiff, Mac Icons and Pixadex iContainer. These fancy and professional icons (some are certainly looking familar) can be used on commercial web-sites without any charge. You’ll find the download-link at the bottom of Jonas’ startpage. His download-page may present some other icon treasures - but in this case for private use only.
Feedicons is a 34-part iconset from Zeus Box Studio. You might be willing to use them to give your “subscribe to RSS-feed”-button a fresh look.These icons are, besides some inept exceptions, variations of the well-known original, which makes sense. You may download them in a 32*32 and 16*16 format as .png (.zip-archive). Released under the Creative Commons License.
Web 2 Social Bookmarks: 12 FastIcon-freeware “iPhone-like” icons of Web 2 Social Bookmarks for use in blogs, websites, on desktop and software. The Content: Blinklist, BlogMarks, Delicious, Digg, Feeds, Flickr, Furl, Magnolia, Newsvine, Reddit, Stumbleupon, Technorati. The Linux version includes .png files sized from 512×512 to 16×16 pixels.
Emoticon: 14 smileys-icons.
104 standard PC keyboard key icons: useful for video training projects.
Circle Feeds (FastIcon): 4 variations of Feeds Icon in circle shape, for Linux, Mac OS and Windows.
Source :Smashing Maginzine