Handycons is a free, hand drawn social media icon set that contains 12 icons. Package contains icons for del.icio.us, Digg, Mixx, DesignBump, StumbleUpon, Reddit, Developer Zone, DesignFloat, Technorati, Twitter and RSS feed & Email icon, of course. All icons are available in four sizes: 16x16, 24x24, 32x32 and 48x48 pixels.
I made it using ArtRage and my Wacom Intuo 3 ;)
Download the icon package (zip archive, 166kb)