Thousands of public domain and Creative Commons-licensed icons. Unfortunately(?), they’re all in SVG format, so you’ll need to use a tool like ImageMagick’s
convert command to make them into PNG files.
Pro version contains 400 icons created specifically for iPhone & iPad toolbars and tab bars, they’re also perfect for Android, websites, t-shirts, tattoos, UI design and more.
Free version has 200 icons, but no retina versions.
An exclusive icon set for Cocoa developers: this very complete set contains 450 icons, specifically designed for mobile apps. They come in 2 resolutions so they work well on the retina display of the new iPhone 4S.
The download contains PNG files in 2 formats, a PDF and a PSD file so you can tweak them if needed.
iconSweets was great, but too limited… so we designed more! iconSweets2 contains 400+ icons both in 64x64 and 32x32 and 292 16x16 icons, all created as vector Photoshop shapes.
Yummygum designed 60 free vector Photoshop icons with care. Perfectly suitable for iPhone & iPad apps or your new web project!
iconSweets is a free icon set containing 60 vector Photoshop shapes, influenced by icon sets such as Glyphish and Pictoico.
350 Icons Optimized for iPhone & iPad Retina Displays. These icons can also be used on websites.