PC.De has released a bunch of quality web appliacytion icon sets for public download with no charge. 5 sets of totally 1000 high-quality free .PNG icons in sizes 16×16 and 32×32 for bloggers, web designers and developers. They are licensed under Creative Commons Attribution 3.0 License so that you can use in private or commercial projects.

“Dortmund” icon set – was designed for use in web designs with white background. All icons are oriented towards practical use and commerce. “Munich” – Orange, bold and outlined 100+ free .png icons designed for use in web designs with white background. “Cologne” – a simple combination of blue and white and can be used designing a WordPress theme or eccomerce store. “Hamburg” – best for a personal blog. Don’t forget they currently offers two free fonts for Mac OS X, Win, Linux users download as well.

• http://pc.de/icons/

The Graphs 2 is a set of 36 unique graph icons in vector format (.AI and .SVG) with a ready-to-use 169 variations. You are possible to modify the colors, resize elements, replace objects, make adjustments, make new combinations, etc. so the graph set is completely editable. With the power of Scalable Vector Graphics you can use these icons directly into your web pages. The Graphs 2 consists of 36 unique graph designs and many different variations. The complete 169 presets offer excellent initial choice. The set includes many chart types like line, bar, pie or area and is a perfect fit for any type of usage. You can use the set for all of your projects for free and without any restrictions. You can freely use it for both your private and commercial projects, including software, online services, templates and themes.

• http://graphs.nicer2.com/

Web designer Dale Morrell from 19eighty7 has released two free web application and social media icon sets for free download. Spirit20 is a huge set of small icons that consists of almost 500 transparent PNGs at 20×20 pixels. Its sections including documents, media, system, internet, mail, hardware, users, actions and misc. Spirit20 is completely free to use for both personal and commercial projects. No attribution is required.

• http://www.19eighty7.com/icons/

Socialmonochromicons is a set of 150 scalable vector social media icon set starter kit for developers. You can almost find all social bookmarking sites or popular social media service icons. The icon set is monochrome, and come in vector (.EPS) and transparent .PNG files so you can customize these social icons easily for your projects. Socialmonochromicons by Elegant UI is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License. Download Socialmonochromicons V2 for free.

• http://www.elegantui.com/?p=19

Gentleface Toolbar Icon is a set of elegant icons for used in any type of software, websites or mobile applications. This is a set of 8 cursors plus 236 icons in black and white color versions. Gentleface icons include pagination arrows, ratings and voting controls, social interaction symbols file system and text editor actions. These 244 icons focus on the toolbar part of applications for wireframes and software mockups creation, websites and software applications toolbars and menus including iPhone and iPod apps. Designed for graphical user interface (GUI) designers, icons come in 16×16 px, 32×32 px, 48×48 px sizes in .PNG and .SWF formats with black on white and white on black colors. Besides, Royalty Free package includes vector icons in EPS and flash SWF formats for which you have full control to resize without loss of fidelity, color, and effects as you please. And the Royalty Free license is $29.99.

• http://www.gentleface.com/free_icon_set.html

Default Icon is a set of elegant and tiny icons (84 icons totally) that is released for free by Interactivemania. These icons can be used on web applications, web sites, or any portable device like iPhone, iPad, android compatible devices etc. The resolution of Default Icon is 1-bit and fully customizable since there is an .EPS, .PNG, .GIF versions. The color is monochrome, in black and white colors only. The default size is 16×16 px and available to download.

• http://www.defaulticon.com/

IconSweets is a set of Photoshop vector icons for iPhone, iPad or other web applications to use. It totally includes 60 icons in 32×32 and 16×16 .PSD format and you can download this sweet tiny icon set for free. It can be used in both commercial and non-commercial projects. Icon Sweets, influenced by icon sets Glyphish and Pictoico, was designed by Yummygum.

• http://www.iconsweets.com/

FindIcons.com is a new free icons search engine allowing you to search through more than 280,000 icons in over 2,000 packs. Find Icons icon search engine has the largest database of free icons on the web that powered by a sophisticated search filtering and result matching system, enabling you to easily and quickly find what you want. You can search icons with not only keywords, it also allows you to filter your results based on dimensions, icon background, color with 12 colors available, style such as 3D, crystal or hand drawn, licensing and more. You can also create your own sets with your favorite or frequently used icons. Moreover, you can share your icons with other users by uploading to the community. The built-in icon converter enabling you to convert icons into BMP, EPS, GIF, JPEG, PSD, SVG, TGA, or TIFF formats. Also, multi-resolution .ICO and .ICNS formats are well supported as well.

• http://findicons.com/

• http://icondock.com/free/vector-social-media-icons

Shine is a set of 31 shiny realistic icons in five different size for both vector and pixel formats. With the fresh color scheme combines with prominent realistic shapes, Shine will make your websites and interfaces really stand out from the crowd. The Shine icon set has 31 icons ranging from 24px to 128px square icons.

Glossy Buttons is a set of 33 simple, crisp and well-designed icons. The combination of fresh color scheme and sharp shapes make the icons prominent and easy to use. The icons are available in SVG vector format and other graphic formats.

Yummy is a set of delicious, tasty and beautiful free iconset. Yummy contains 20 icons available in various sizes, from 48px square to 128px square. We also include scalable and editable vector icons in this set.

The Fresh Add-on contains 59 high quality fresh applicable icons as application and financial symbols to make your web applications and softwares more atractive and adorable.

• http://www.androidicons.com/

Pinvoke, a freelance design studio based in Tokyo Japan, released a clean, sharp and useful web application icon set – Fugue Icons for web designers and developers, containing over 2000 semi-transparent .png format icons in the resolution 16x16px with a large variety range of designs such as e-mail icons, software icons, general web application icons and blog icons. All icons are free to use for personal and commercial projects under Creative Commons Attribution 3.0 license.

• http://www.pinvoke.com/

In order to get more social networking traffic, the importantance of a unique, cool and well design social network icons cannot be neglected for your site to get more social network traffic from like digg, delicious or twitter. Today it’s a new roundup for selecting the high quality amazing social bookmarking/networking icon sets. You can download and use the small social networking icon sets for all of your personal projects including blogs, software, online services and templates.

Social Networking Icon Pack
The Social Network Icon Pack consists of 40+ 16 pixel x 16 pixel icons and 40+ 32 pixel by 32 pixel icons all in 32-bit PNG format designed by KomodoMedia.

Glossy Black Social Network Icons
108 high resolution 3D glossy black button social, social bookmarking, social networking icons.


Hearting Social Icon Set
This set was designed by the creator of TheDesignSuperHero.com, released by Smashing Magazine. A set of 22 social icons in .png and in resolutions 16×16, 32×32, 64×64.

Social Media Icons Pack
This icon pack includes 3 sizes for 17 icons: 128×128, 64×64 and 32×32. There is an icon for the following: Blogger, Delicious, DesignFloat, Digg, Facebook, Flickr, Google, a heart icon, MySpace, Reddit, RSS icon, StumbleUpon, Technorati, Twitter, WordPress, Yahoo! and YouTube.

Fasticon Social Bookmark Icons
12 freeware Web 2.0 social bookmarks (Blinklist, BlogMarks, Delicious, Digg, Feeds, Flickr, Furl, Magnolia, Newsvine, Reddit, Stumbleupon, Technorati)for use in blogs, websites, desktops or web applications includes .PNG files sized from 512×512 to 16×16 pixels.

Web Social Icons
This is complete web social icons pack for your blog and websites. Full download contains 38 icons and each icon has 5 sizes.

Social Grunge Icons
It is a set of social grunge icons which contains all files in PNG format. Icons are available in three different sizes 16×16 , 32×32 and 64×64 .

Social 2 Duo
The world’s first social networking icons with integrated dual core technology guaranteed to enhance the performance of your applications or blog. Package contains 10 Royalty Free icons that can be used for personal and commercial purposes.

Hand Drawn Doodle Icon Set
Spoongraphics has released this stunning set of hand drawn doodle icons includes 14 graphics tailored specifically for bloggers. Including social media graphics for Delicious, Design Float, Digg, Facebook, StumbleUpon, Technorati and Twitter as well as commonly used icons such as RSS, Home, Comments, Contact and WordPress.

Handycons 2
Handycons 2 icon set contains 20 more hand drawn icons like Facebook, Blinklist, Feedburner, Flickr, FriendFeed, Furl, Gmail, Google, Heart icon, Last FM, Linked IN, Magnolia, Newsvine, PayPal, Skype, Sphinn, Twitter, Vimeo, Yahoo and You Tube icons. All icons come in four sizes: 16×16, 32×32, 64×64 and 12x128px. Want more? Check out Handycons version one!

Social Icons Made of Wood
The set consists of 11 icons in PNG format with wooden feel design.

Handy Vector Icons by WebdesignerDepot
A set of 24 unique hand drawn free and exclusive vector icons that can be used on websites, logos and more. You need to subscribe to their RSS to get the download password.

Web 2.0rigami
15 origami feel design icons in a variety of sizes in transparent pngs, and the PSD and EPS files.

Vector Social Bookmark Icons
A set of 3D look social bookmarking icons available in PDF vector format and PNG.

Nurture Social Icon
“Nurture” is a fresh social icon pack includes 10 icons featuring the logos of popular social bookmarking sites. The pack includes 512×512, 256×256, 128×128, and 64×64 icons in .png format.

Socialize
Socialize part 2 contains 12 high quality most popular social-network icons in these sizes: 32x32px, 48x48px, 64x64px and 128x128px and 32-bit transparency PNG file format.

• http://www.websitebullets.com/

Anyway, if you are interesting for these small bullets and arrow icons and feel not enough, Bullet Madness at Stylegala is the primary solution and resources for you. Bullet Madness is a list of 200 bullets, arrows and icons uploaded by their users. You are better to bookmark the useful free bullets page for your further reference.

Chrome social media icon set includes total 20 stylish and shiny social media network icons along with a standard RSS icon in PNG format. There are two sizes, 70×70 and 39×40 PX. As usually, the set is completely free and may be used under a Creative Commons Attribution-Share Alike 3.0 United States License. That means you can use it and modify it, but you must contribute the altered design back to the original author (Chris Wallace) of the work.

Click here to directly download Chrome icon set (186kb .zip).

1. First, pick a color for your icons matching the color scheme of your site or blog, they also provide a set of color palettes, or using the HEX code for exactly coloring what you want.
2. Second, select the icon size, large (32×32 px), medium (24×24 px) or small (16×16 px).
3. Final, push an icon you like to download it, that’s all.

• http://www.iconza.com/