An OpenType font for download, this free offering provides an attractive selection of free icons. The designs were created with simplicity and competence from the folks at The Design Office and is available on the popular free fontssite, Font Squirrel. (The icons apparently look good intermingled with Helvetica.)
If you need lots and lots of flat icons, then this project by FreePik will sort you right out, featuring 2,979 icon packs for free, adding up to over 184,000 free icons for both personal and commercial use.
This set of 120 vector icons by Vietnamese designer Min Tran presses all the right retro buttons. If you want more you can find Volume 2 right here, and there are plenty more icons to be found on his Dribbble page.
UXPin's a collaborative wireframing app that's perfect for building prototypes quickly and easily, and to help out with the process the UXPin team has made this beautiful and diverse suite of over 80 icons, designed for web and mobile UI design, available to use for free.
Promising any icon in any format, size and colour in 20 seconds, Icons8 is a comprehensive collection of 19,700 free flat icons. With categories business, clothing, food and more, Icons8 lets users download icons as both a Mac App or ZIP file.
This vibrant collection of shaded vector icons from graphic resource Freepik is just one of the many sets they've curated. Perfect for businesses and independent projects, these icons are free for both personal and commercial use. Each set can be downloaded in an .AI, .EPS and .SVG format.
Rendered in simple black and white, this set of crisp vector icons mix functionality with emotive ideas. Besides standard icons for security and messaging, such as padlocks and envelopes, this collection from Iconfinder also features hearts and eyes to give your designs that personal touch.
18. Modern UI Icons
Here's another fantastic free resource if you're looking for modern UI style icons for your Windows, Android or iOS app. Download the pack and you'll get over 1000 handcrafted flat icons including app bar icons for Windows phone.
An awesome set of 350 pixel perfect icons that are perfect for apps and websites. You can use then for both personal and commercial use and scale them to any size you need.
20. 80 mini icons
Featuring 80 pixel perfect mini icons available in both PSD and Icon Font format. These clean and elegant icons are perfect for any project.
Next: another 10 free icon sets