Gunter supports Font-Awesome, and some flaticons.
Here are the lists of flaticons:
flaticon-quality
flaticon-domain-registration
flaticon-targeting
flaticon-search-engine
flaticon-idea
flaticon-pay-per-click
flaticon-analytics
flaticon-stats
flaticon-link
flaticon-translation
flaticon-bug
flaticon-mail
flaticon-magnifying-glass
flaticon-right
flaticon-plan
flaticon-think
flaticon-shout
flaticon-analytics-1
flaticon-ux-design
flaticon-camera
flaticon-data
flaticon-chat
flaticon-project
flaticon-quote
flaticon-logo
flaticon-twitter
flaticon-linkedin
flaticon-logo-1
flaticon-down-arrow
flaticon-back
flaticon-multimedia
flaticon-search
flaticon-edit
flaticon-plus
flaticon-line
flaticon-tick
flaticon-chevron