All clever things are usually very simple. Sometimes you just want to stay with the old valuables and keep it subtle. These icons will look great with clean and minimal web designs and also notice since almost all of them are monochromatic you can put different colors, create your own letterpress and different effects without spending time to create your own actual icon.
I think minimal and letterpress effects currently are very popular in webdesigns and many designers will find this collection useful and worth bookmarking!
Editable PSD file with Illustrator vectors.
2. Mini Icons
Free icon set from http://www.famfamfam.com/. 16×16 GIF.
3. Mono Icons
108 gray 32×32 PNG icons. You can customize the color. Also free for commercial use.
Iconic is a minimal set of icons consisting of 114 marks in raster and vector formats. 5 different sizes up to 32×32, nice flexibility. Creative Commons 3.0 license.
Pictodeck is a set of over 700 pictograms in vector format designed specifically for Keynote. That means you can scale them to any size you desire without any loss in quality. All of the icons also support transparency. The set was created by Aaron Richard. All are licensed slightly differently under Creative Commons.
6. Ecqlipse 2
100+ icons in various resolution up to 128×128. Also available as .ico.
collection of over a 100 letter pressed icons, in various letter pressed styles. The icons include three PSD files which are full of icons which you can drag and drop into your designs. Creative Commons license.
9 GIF icon sets. Creative Commons license.
128 icons in light and dark versions. Available as 128×128 PNG or ICO up to 256×256.
99 16×16 ICO files.
100 fully scalable pictograms/icons. Comes as a AI, SVG, XAR.
22 500×500 PNGs. Free to use in commercial and personal works.
13. Wireframe Mono
244 (8 cursors) icons optimized for 16×16, 32×32, 48×48. Available as PNG, ICO, GIF. Creative Commons Attribution-NonCommercial license is free.
Massive set of about 500 icons. Available as 16×16, 32×32 PNG or SVG.
15. DOT Pictograms
68 free icons up to 256×256 PNG.
16. Snow Icon Pack
102 royalty free website & GUI icons that can be used for both personal and commercial purposes. Royalty free license. TIFF, ICNS, ICO, ICON, PNG. 32×32
51 free icons. PNG, ICO, ICNS. Designed by Alexey Egorov.
30 16×16 icons. PNG, ICO, ICNS. Created by el73.be
19. Mini Pixel Icons
320 icons available in various color themes. 14×14 GIF.
21 icon in light and dark version. Transparent GIFs.
AI, SVG, JPEG.
23. Mini Icons
113 10×10 GIFs. Creative Commons Attribution-ShareAlike license.
24. Doctype Icons
42 16×16 GIFs
A free set of over 250 18×18 pixel icons. Each icon was carefully created one pixel at a time using only whole value hexadecimal shades of grey. Creative Commons license.
450+ 16×16 PNG icons.
36 icons, 6 different types, 6 color variants.
28. Silk Companion
450+ 16×16 PNG icons.
Available in OpenType font format.
30. Diagona Icons
200 PNG icons. 10×10, 16×16.
Icons with apple touch. PSD file.
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