IconArchive.com, OpenClipArt.org, StreamlineIcons.com and IconBug.com feature free icon clip art. Most of the sites have icons available in individual units or in combined collection packs covering many common groupings, including jobs, holidays, clothing, foods and a variety of social media.
Most of the clip art suppliers have search tools that allow users to find the exact types of images they need. Several have clip art available in multiple sizes and formats. Some are pixel-based graphics that can limit the users scaling ability, while others come in vector-based files that allow for unlimited size formatting. IconArchive also allows users to donate to the icon's creator if desired.