Finding royalty free icons is often a difficult task, especially when you need a specific size, a color variant or a specific identification. Some icon search engines can already search icons via simple keywords, such as icon finder or iconlet. But a new icon search engine (a french one…), icones.pro, pushes the concept further by allowing you to filter by color or by licensing. Other features, such as auto-completer with real-time preview, or size filtering, makes navigation even more enjoyable and effective.

Icones.pro - http://icones.pro/
Icon Finder - http://www.iconfinder.net/
Iconlet - http://www.iconlet.com/
Icon Search - http://icons-search.com/