In this article we some great icons font for commercial use.
Font Awesome
Compose 361 Icons, IE7 Support, compatible with Bootstrap. License: MIT License
maki Icon
License: BSD license.
typicons font
license: CC BY-SA licence.
Ligature web font
License: SIL Open Font License
The Entypo Pictogram Suite
licensed under CC BY 3.0 and the font under SIL Open Font License.
Iconic
The icons licensed as Creative Commons Share Alike 3.0 and all generator scripts are licensed as GPL.
Metro-UI-CSS
Scalable Icons
license: MIT license.