Discons is a set of 95 icons that only has 2 colors on each: dark gray and white.
It comes in transparent PNG files with 24*24px size for every item.
The set includes the most popular items from social media to actions, devices and various shapes.
In the same page with Discons, there is another set provided named Minicons, which is a group of very similar icons in 16*16px size but have fewer items.
IconShock, a well-known icon design company, is sharing an impressive and complete social bookmarking/networking icon set.
The set has ~150 unique items in 9 different pixel-perfect sizes and they are all available in .PNG, .PSD, .AI and .ICO formats.
Also, for mobile applications, there is a "mono version" included as well.
That's not all. Every icon has 3 color states: enabled, disabled and normal. Simply, a must bookmark.
WooCons #1 is a set of 170 good looking icons that is shared by WooThemes.
The icon set is very ideal to be used in web applications as it covers the most used ones like actions, documents, player controls, charts and much more.
The set comes as 32*32px in transparent PNG format.
It is also mentioned that the "#1" is a sign that we can expect more icons from WooThemes in the future (looking forward to them).
WPZOOM, a premium WordPress themes community, is sharing a complete set of social bookmarking icons.
The set includes 500 items which is actually 100 icons in 5 different sizes- (64×64, 48×48, 32×32, 24×24 and 16×16px).
Icons are in .PNG and .PSD formats and the package includes almost every popular social bookmarking website.
Reflection is a set of 200+ free icons that is created by Webdesigner Depot.
The set includes 128*128px transparent PNG files in black&white and also comes with the vectors in .AI format which simply enables us to convert them to any color or size.
The name of the set is a referral to the tiny reflections under each item and the set consists of elements like actions, media, devices, documents and much more.
Mobile Berries is a set of 80 high-quality and slick icons that fits to web or mobile applications very well.
The set comes as transparent PNG files in 64*64px sizes and includes items like documents, media, mobile and more.
The set is free to be used in personal and commercial projects (for commercial projects, an attribution is required).
Omer Cetin, a talented icon designer, is sharing 2 sets of beautiful icons with a total of 110 items:
The icons are in transparent PNG format, 32*32px size and including items like documents, media, devices and much more.
ComFi, a communication company, is sharing a set of 30 very well-designed and detailed telecom icons.
The set includes items like wifi, bluetooth, voip, vpn, answer call, end call and much more.
They are all in transparent PNG format with 32*32px sizes and can be used in both personal or commercial projects (requires attribution).
Boolean is a set of 100+ free icons that can be used easily in web applications.
It has a motto: "The Pixel Icon City" as the set is wrapped like a city with various stores and new ones are added regularly.
It includes items like actions, e-mails, signs, electronics and all the icons are in transparent PNG format with 16*16px size.
spirit20 is a set of 450 free icons that are ideal to be used in web applications.
It includes various items of actions, media, documents, mail, system and more.
The set is in transparent PNG format and sized 20*20px.
And, it is completely free to be used in personal and commercial projects (and no attribution is required).
