Many projects need high quality file icons, whether it is a web application or a simple website that may be offering downloads of files. Visualizing the file types help the user quickly understand what a file or link is about.
File Type Icons is a free set of slick icons that features 20 of the most popular file types including image, PDF, Word, Excel, text, PSD, HTML,CSS and more.
The icons come in 2 formats: PNG (128*128px) and well-layered PSD files.
P.S. The download of the icons require a free membership to the e-mail list of the website.
Freecns is a completely free set of slick UI icons that are a perfect fit for using in applications.
There are 200 items in the set where the majority of them are action icons.
They come in transparent PNG and sized 16*16px.
Joseph North, the talented designer of Sublink Interactive, has created an icon set named SweetiePlus which is shared for free.
The set have 120 icons in total, has 2 sizes: 16*16px + 24*24px and comes as transparent PNG format.
Items in the set are mostly action icons which is nice for app designers/developers.
Jigsoar Icons is a set of 60 very good looking, smooth icons that are released for free.
The download package includes transparent .PNG items in four sizes (16px, 24px, 48px, and 64px) with light and dark versions of each icon.
There is also the Adobe Illustrator vector file (.AI) for customizing them however you wish.
Icons are flat, have a mobile-like style and includes widely used ones like edit, delete, e-mail, basket and more.
The Working Group, a talented web agency, has created a set of pixel-perfect iPhone toolbar icons and released them for free.
iPhone Toolbar Icons consists of 160 items in transparent PNG which are sized 30*30px.
Items included in the set are very common ones that any app can require (like arrows, charts, media player and text editor actions, etc.)
There is also a retina display version of the set with 3 different sizes (24*24px, 48*48px and 64*64px).