Metrize is a slick set of 300+ vector icons that have a Metro UI-like style.
The set comes in multiple vector formats (PSD, SVG, EPS, AI, PDF) and as a web font.
All major items required for web apps are included in the set (like arrows, actions, social networks, etc.).
And, it can be used freely in both personal + commercial projects (no attribution required).
Smileys are used widely in communication apps and design elements as they ease delivering emotions.
Simple Smileys is a free set of smiley icons that are mono-colored and, like the name states, simple (yet very clear and beautiful).
There are 45+ items where new ones are added within time, they are sized 15*15px (some of them have a bigger height) and come in .PNG format.
IconBeast Lite is a high-quality and free iPhone icons set that iOS developers will probably like so much.
It is the smaller version of IconBeast Pro (that has 1700 items) but still has lots of icons (300).
There are items from actions to arrows, charts, devices, social networks and more.
They are in PNG format, sized 30*30px and free yet require attribution when used.
If you liked the quality of the set and still need more icons, make sure to check out IconBeast Pro | 1700 iPhone icons.
Sometimes we find an icon, love its design but the colors don’t fit to the project.
With Icons DB, a free and growing set of flat icons, that is not possible as we can get all the items in any color we prefer.
The set includes 1800+ items in multiple formats (ICO, PNG, JPG, GIF) and 8 sizes from 16*16px to 512*512px.
There are many icons which can fit very well to web apps and almost each item has multiple variations that can satisfy each taste.
Only drawback is the inability to download the whole set as they are only offered one-by-one.
Although there are so many of them, it is always good to have more options for social icons as different styled ones can fit better to different websites.
Simple Icons is a set of 96 free social icons that cover almost all of the well-known social services (Twitter, Facebook, Instagram, Google+ and much more).
All the items are placed on a different background color that matches the related brand and all looking slick.
They come in 11 different sizes from 16*16px to 4096 to 4096px and in .PNG format and free to use in commercial projects.
There are various free icon fonts out there and, with the increasing use, new ones are being created each day.
MFG Labs Icons is one of them, it is a slick, free and pretty complete icon font.
It is a web app-themed set considering most of them are actions (and there are social items as well).
The download package includes all the popular web-font formats and the styles for them.
When working on any mapping-related projects (like Google Maps integration), icons built specifically for them can be very handy.
Maki is a free set of “point of interest” icons that is perfect for web-based mapping interfaces.
The set includes 73 icons, comes in 3 sizes and both in PNG + SVG.
Besides standard markers, there are items for airport, bus station, police, restaurant, grocery and more.
Today, we are sharing a very nice freebie: a set of slick and minimal icons created by Geoffroy Amelot for WRD readers.
It is called Minimalist Icons and can be used in both personal or commercial projects.
There are 296 items in the set from social networks to actions, charts, devices, media controls and more.
All of them are in transparent PNG format, mono-colored and sized 12*12px which can be a good fit (mostly) for web applications.
Use them freely (no attributions required) and it is only not permitted to redistribute them.
I’m Geoffroy Amelot, a 33 yo french Art director from Paris, specialized in digital.
You can find me at my personal website and Behance page.
IcoMoon is a free service that enables us to create custom icon sets and icon fonts using different sets.
The application includes most of the popular and free icon sets (that can be selected from its library), we can choose which ones to use and select any number of items from them.
Once the selection is over, it offers 2 types of downloads: image and font.
The image version comes as PNG with optional sprite image + the CSS rules and the font version in multiple formats (EOT, SVG, WOFF, TTF).
Also, besides the icons of other designers, IcoMoon has its own and free icon set which is pretty huge and slick.
For anyone developing games, there is always a huge demand of high-quality graphics for the characters, objects, backgrounds and more.
Game-Icons is a project providing 900+ free icons (and growing) to be used for games but they can also be used for any other projects.
The items are in .SVG and .PNG formats, they are very well-categorized and can be used in commercial projects as well.