The demand for development icons is huge, and thankfully this year has been a fairly productive year with new icon sets being freely released every other week. As you will see from the list below, they are all of high quality, some do have more flexibility than the others, and some do have limited numbers and options, but all are beautifully designed.
Anyway, all of the icons I have listed below have been designed specifically for web design, web development, web applications and blogging. And I am sure you will agree, they are amazing.
This icon pack comes packaged with 108 gray icons that can be easily customized within Photoshop and Fireworks. This Icon Pack ican be used in your personal and commercial projects, and can be used without attribution.
There are 30 icon in this .png icon set, and you are free to use these icons for any project as many times as you like.
This free set includes 20 icons that you can use for both personal and commercial projects. Resell and distribution is not allowed. The icons are available in three different sizes: 16px, 32px, and 64px in 32-bits transparent .png format.
This set contains 10 high quality blogging icons in .png format, you can use them on any personal or commercial projects and they come in the following sizes: 128px, 64px, 48px and 32px.
There are 25 scalable .ai format icons in this set, which can be opened with any version above Illustrator 8.0. With earlier versions, you may loose some of the effects.
This set is licenced under Creative Commons License.
This icon set has been designed as a starting point to get your design phase off the ground, allowing you to create quick mock ups for your clients and flesh pot ideas.
The package includes 30 .png menu icons plus the additional source files for further customization.
All icons are distributed under a Creative Commons Attribution Share Alike license, so feel free to use them in any form in you projects or even remix them.
This free download contains a total of 79 icons, all sized at 256×256 pixels and available in both .png and .gif formats.
There are a total of 30 icons in this set, all sized at 48×48px and are packaged with both .png and .ico formats.
The icons are free for personal and commercial use, but the designers do require linking to there web site. The package contains 59 icons, available in four different sizes and are available in Windows, MAC and .png format.
The icons are available in .png, .icon and .icns format. They are free to use for both personal and commercial projects, including websites, templates and software. In total there are 100 icons at 64×64px.
This huge set of icons (200 in total) come in 6 different raster sizes and the vector source files are also included. These icons are completely free for both personal and commercial use.
The Quartz icon set contains 90 semi-transparent .png-icons in the resolution 64×64px. You can use this set for all of your projects for free and without any restrictions.
There are over 100 fully scalable pictograms/icons in this set. No watermarks, no limitations: available in all major, industry standard scalable vector formats.
With over 1000 icons, this set is by far the biggest icon set in this article. It includes both 16 and 32 pixel versions of the icons , and the images are all in .png format on transparent backgrounds.
The WooFunction Icon Set includes 178 amazing web-related icons in a sophisticated and glossy design style. All 178 icons are available as 32×32px .png files.
There are a massive 500 icons in this mini icon (16×16px) set. You can do whatever you want with these icons, as long as you don’t pass them off as your own.
There are 42 high quality icons in this set, available in the following sizes: 64х64, 48×48, 32х32 & 16х16.
There are 128 unique icons for apps, folders, settings, and the desktop. Each icon has two color variants, dark and light and each icon is available as a 128×128 .png or as a Windows .icon. There is also a .psd file included in the set for easy customization.
These iPhone UI icons are 24-bit .png images used as a mask to generate selected and unselected button states. Dimensions should be about 30×30 pixels for tab bar icons and about 20×20 pixels for toolbar and navigation icons.
In this huge icon set there are just under 200 icons and all available 48×48px. This sset has been released for free under the Creative Commons licence.
The Milky set contains more than 131 icons primarily colored in green, available in .png format with the following sizes: 64×64px 128×128px.
There are 16 icons in this 24×24px icon set. This icon pack is licensed under a Creative Commons Attribution-Share Alike 3.0 License.
There are 28 icons in this .png set, available in the following sizes: 16×16px 32×32px.
This 148-icon set contains all crisp-shaped icons that are designed for wide use in web applications, multimedia and software.
This small, but beautiful, icon set has only 11 icons sized at 32×32px.
All icons are completely free for both personal and commercial use. The icons are available in 4 different sizes (32×32 pixels, 48×48 pixels, 64×64 pixel, and 96×96 pixels) and come as 32-bit transparent .png files. The icons are also available in vector format.
The set includes 26 .png stylish icons at 48×48px. This Free Icon Pack is for use in your personal and commercial projects, and can be used without attribution.
There are 310 icons in this package. They are all 16 by 16 pixels, in .png format and free to use in print and web projects.
There are over 450 icons in this amazing set. The files are transparent .pngs, and the source files (.psd) are also available for download. The set is completely free and may be used for any private or commercial project without any restrictions whatsoever.
There are 28 .png icons in this set, available in 16×16px and 32×32px.
This is the fifth part of the Coquette free icon series. The icon set contains 50 high quality, free icons in these sizes: 16×16px, 32×32px, 48×48px, 64×64px and 128×128px and 32-bit transparency .png file format.
The icons are available in 5 different sizes (16×16px, 24×24px, 32×32px, 48×48px and 128×128px) and come as Windows ICO and 32-bit transparent .png files. The icons are also available in vector format (Adobe Illustrator AI format).
30 free office icons which render at 256×256, 128×128, 64×64, 48×48, 32×32, 24×24, 16×16 pixels and with the formats .png, ico and icns.
This free icon set includes 36 hand pointer icons of 6 diferent types with 6 color variants. The download package also includes the .psd source file.
The icon set includes 16 flags in two differenct style, normal style and rotated style. The raster icons come in three different sizes (32 pixels, 64 pixels and 128 pixels) and in 32-bit transparent .png format. Also the vector source file is included in the free set (Adobe Illustrator CS4 .ai format). The set is completely free for both personal and commercial use.
There are 172 flag icons which render at 256×256, 128×128, 64×64, 48×48, 32×32, 24×24, 16×16 pixels and come in .png, .icon and .icns formats.
In this simple social media set there are over 60 icons, in four sizes and cover every possible social media service you could think of.
The Social Network Icon Pack consists of forty 16×16px icons and forty 32×32px icons all in 32-bit .png format. They are free to use for non-commercial projects.
This icon set consists of 30 (16×16) finely crafted social media icons. They are free to use non-commercially.
This set contains 20 icons for popular payment methods such as MasterCard, PayPal, Visa, American Express, Diner’s Club and much more… All icons are in .png format and come in three different sizes: big (130×80), small (80×49) and tiny (50×31).
Each icon in this set are in .png format and are supplied in 128px, 64px and 32px heights. There are two versions of each icon, one with curved edges (on a transparent background) and one with straight edges.
The RRZE (Regional Computing Centre Erlangen) has created a new icon set based on the Tango Desktop Project, which consists of an extensive and very uniformly created icon set. It focuses on Identity Management Systems, especially on user administration.
The RRZE Icon Set is licenced under a Creative Commons Licence.