The following are common methods you will want to call in your front end templates:
craft.iconPicker.getIcon(icon)#Fetches an Icon from the provided filename and relative path.
craft.iconPicker.getDimensions(icon, height)#Returns the dimensions of an icon from the provided filename and relative path. Optionally provide a height to constrain the dimensions by.
craft.iconPicker.inline(icon)#Returns the raw content from the provided filename and relative path.
craft.iconPicker.spritesheet(path)#Returns the raw contents of an SVG Spritesheet for a provided path. Used to output the spritesheet on your site, inline with your template content.
craft.iconPicker.fontUrl(path)#Returns the full URL to a font file, provided the given relative path.