A complete set of 31 social icons prepared with their rollover state coming in 256px, 128px, 64px and 32px. You get two rollover style: 3D and lighting up effect already prepared for you in html/css format. Many options to get creative here.
You can download source files (free download of course) at :
Royalty free for use in both personal and commercial projects.
No attribution required. For more details visit link above.