The WooFunction Icon Set includes 178 amazing web-related icons in a sophisticated and glossy design style. All 178 icons are available as 32×32 pixel PNG files and we can assure you that they are indeed pixel-perfect.
Web Injection is an Icon Pack for webmasters and web developers created exclusively for the viewers of Tutorial9. The set includes 26 stylish icons designed by Midtone Design Studio. Each icon is a .png at 48x48px.
If you need some free feed icons for your site here is a great icons set and a feed icon generator. Also there is a dev kit that includes icons ranging from 12×12 to 128×128 in various formats, including AI, EPS, SVG, PSD, PDF, PNG, JPG, GIF.