The Icomoon App is a web based tool that's especially useful for creating custom icon fonts on a per project basis.
The Icomoon App allows you to do each of the following :
- Get one or more icons from several popular icon fonts
- Upload other fonts, which may be icon fonts but also regular fonts
- Upload SVG files to use as icons
- Combine any number of icons from any number of available fonts
- Set the UNICODE hex value for whichever characters you need
- Export and/or save the font set you create