Without these resources Typicons would not be possible in it's current form.
Using Icon Fonts
A great write-up on the benefits of icon fonts and detailed instructions on how you can make them yourself using IcoMoon. http://gomakethings.com/icon-fonts/
Fontello contains a collection of icons by various designers (including Typicons), and allows users to build custom webfonts. http://fontello.com/
Offering over 3800 free and open source icons and a custom icon font builder, which allows users to select only the icons they need. http://icomoon.io/
An Adobe Illustrator plugin that allows for quick exporting to several file formats. http://www.ericson.net/content/2011/06/export-illustrator-layers-andor-artboards-as-pngs-and-pdfs/
Looking for the old version of Typicons? You can find it here.