1. Flat Icons: More Than 3600 Icons
You can use this gigantic set of over 3000 icons in the flat design style even in your commercial projects. Disclosure: I am the founder of Iconshock, the site that created and released this free icon set.
2. Rounded Flat Style App Icons
This PSD file contains 9 icons in the popular flat design style for your mobile app’s icon.
3. Flat Icons
12 flat design style icons in a PSD file.
4. 30 Free Flat Style Social Media Icons
A free PSD file containing icons of popular social media sites like Facebook and Twitter, designed by Texan graphic designer Nathan Brown.
5. Premium Flat Social Icon Set
A set of 20 free flat design social media icons that come in two flavors: "rounded corners" or "circles".
It took a month for Slovakian UI designer Lukas Jurik to create these 48 flat design icons. Now he’s giving it away for free.
7. Free Flat Icon Set
This set has 9 flat icons in PSD format.
8. Flat Design Icons Set Vol. 4
This free icon set has 16 free icons with flat designs. This set was inspired by Google. It is the fourth expansion of this icon set series by PIXEDEN.
9. Garden Icon Set
This free flat design icon set contains 12 beautifully crafted icons by UK-based web designer Shaun Dona.
10. Social Icons – Freebie
This free set of 24 social media icons in PSD format uses the long shadow design trend that gives flat designs some bit of depth.
11. Simple Flat Social Media Icons (PSD & PNG)
Here’s another free package of 20 clean, flat-design-style icons in PSD and PNG file formats.
12. Free Flat Style Icon Pack
Another icon set by Nathan Brown, this is a set of 25 free flat design icons in one PSD file.
13. Free Flat Icons (by Sensational Fix)
This free set of 36 flat design social media icons is in EPS and AI vector file formats. You can also get the HTML/CSS/SVG version of the icons here.
14. Free Colorful Icons (PSD)
These 12 vibrantly beautiful icons in the flat design style is served up to you in PSD format.
15. 20 Flat Icons (PSD)
This flat design icon set contains a random assortment of useful icons like a magnifying glass icon and a cogwheel icon; it seems to be geared towards UI design.
16. Free Icon Set 1.0
This set of interesting icons in the flat design style is by Wisconsin-based creative Michael Schultz.
17. [Freebie] Flat Icons – Part 2
This 6-piece icon set comes in PSD and .sketch format.
18. 12 Flat Icons – Free
This is a vibrant set of free flat design icons.
19. Free Web Icon
32 flat icons are yours to be had for personal use if you download this set.
This set of 9 delightfully flat icons has a folder icon, chat bubbles icons and more.
Tags: online marketing, remarketing