OpenIcons is a set of SVG icons intended to be used on the Web. All the icons are vector-based and made using InkScape. The icons can easily be converted from SVG to pretty much any common graphics format. Since the icons are meant to be used primarily on the Web, the default distribution of the icons includes PNG copies of all icons scaled to the following sizes: 16x16, 32x32, 64x64, and 128x128 pixels.
3D Business Icons is a collection of business-related icons for Web sites and software projects. it contains images in 16x16, 20x20, 24x24, 32x32, 48x48, 128x128, 256x256, and 512x512 pixel sizes. All of the images are hand-crafted by professional graphic designers and present smooth, well-rounded edges. The file formats provided are ICO, BMP, and PNG with a transparent background.
SuperStamps is a collection of 654 beautiful, professional looking PNG images and icons. They come in many different colors with a modern, glassy look. A free trial includes 25 high quality images. The collection includes images suitable for technical reports, presentations, Web sites, blogs, Snagit stamps, tutorials, videos, and much more.
Free Mobile App Icons is a collection of stock icons for mobile apps that makes it easy to make beautiful Android, iOS, and Windows Phone apps without breaking the bank. With 200 unique icon images and all standard sizes included from 16x16 to 60x60 pixels, you can use the icons on devices with standard and high-definition displays, in app bars, toolbars, tab bars, and navigation bars.
Large Travel Icons is a collection of attractive icons representing objects and concepts related to travel products. It includes high quality professional icons for tourist, travel, and transportation applications and Web sites. Bright colors and precise outlines make these icons more realistic and effective. All the icons included in this collection are presented in BMP, PNG, and ICO formats, and in seven sizes (16x16, 24x24, 32x32, 48x48, 64x64, 256x256, and 512x512).