Iconza — collection of 112 customizable free icons that can be colored and reduced in size to your taste with the help of a web-based application.
The set currently contains 112 totally free icons. You can choose any color, size 16x16px, 24x24px or 32x32px for the icons. Whole set – PNG files – can be downloaded as a ZIP file.
Project Icon Set – contains 18 beautiful & free icons related to project management.
The set includes the icons address card, bar graph, calendar, clock / time, conference device, contact, documents, draft, mail, marker, milestone, notes, portfolio, project plan / gant chart, search / find, sitemap / flowchart, todo and user / resource.
Page Peel iconset – a set of free social icons.
The set contains 16 social icons at 128×128 and 64x64px and in a transparent PNG format.
They are totally free to use for both your private and commercial projects, including software, online services, templates and themes.
Web Injection – Free Icon Set for webmasters and web developers.
The set includes 26 free icons at 48×48px size and in a Png format. This Free Icon Set is for use in your personal and commercial projects, and can be used without attribution.
Web Blog Icon Pack – free icon set of 52 icons , sized at 48×48 pixels and available in PNG format. Free to use under the Creative Commons licence.
Web Design Mini Icons – 310 free mini icons, designed to be used on web design projects, but some are also suited to be used as system icons. They are all 16 by 16 pixels, in PNG format and free to use in print and web projects.
Easter Bunny Icons – icon set include 44 cute and Free Easter Bunny Icons that you can use for web and print design.
The icons are available in vector PDF format, meaning you can resize them to any size to fit your design.
Icons include: bunnies, birdies, Easter eggs, and candy bars. You can use them to spirit up your blog themes or to design your Easter postcards and invitations. You can also combine them or add custom messages to the signs to create your own icons.
Be sure to check out IconDock Free Icons section for more Free Icon Sets.
WooThemes Icon Set – The free download contains all 79 icons, sized at 256×256 pixels and available in both PNG and GIF formats.
As an added bonus to WooThemes users, they will also be able to download Illustrator source file, which will give them high-resolution, vector copies of the icons.
Free to use in both personal and commercial projects.