Cool Icons Library for Prototyping Splashy Icons – A cool icons library for prototyping containing 400+ free PNG icons. This icons library can be used in web applications, websites, desktop software and for application prototyping.  The package comes in 16*16 px.

10 sets of high quality Free PNG Icons specially designed for web designers and bloggers. This PNG icons collection is free for private and commercial projects and available in 16×16 and 32×32 sizes. Website: http://pc.de/icons/ License: Creative Commons

Birdies is a set of 12 lovely Twitter icons. The icons included in the set have clean shapes and neutral colors and available in both PNG and Vector EPS format. This Free PNG and Vector Icon set can be rescaled to any size while retaining their original details. Website: http://www.iconeden.com/icon/birdies-a-free-twitter-icon-set.html License: Free

IconShock shares a nice set of free finance icons. This free icons collection has been exclusively created for Vandelay Design blog. This free set includes 6 PNG icons & can be used for personal or commercial projects. Download Free Finance Icons

Iconic is a minimal set of 114 Royalty Free Vector & PNG Icons available in 14 different colors. Iconic is available in PNG, SVG, SWC and Omnigraffle stencil formats, which makes this icon set more flexible.

This Free High Quality PNG Application Icons set includes icons for Register, Settings, Users, Database, Login, Chat, Add, Delete, Edit, invoice.

Developers icons is released by Sekkyumu. This Free Developers icons collection contains 105 icons (32X32 ) for your web development or others. All Free icons are available in the format .png, .ico, icns, .icontainer.

This Free Social Icons Set is available to download and use for your projects. Format: PNG Size: 16 x 16 | 32 x 32 | 64 x 64 Download Icons

3 format types to download: Png, Ico & Icns

Package contains 9 PNG and 3 Ico files. PNG Dimension: 64, 72, 96 and 128 Download Free Icons