i make use of fugue, silk, as well as aesthetica (http://dryicons.com http://dryicons.com) and function (http://www.wefunction.com http://www.wefunction.com) se

i make use of fugue, silk, as well as aesthetica (http://dryicons.com http://dryicons.com) and function (http://www.wefunction.com http://www.wefunction.com) sets. all free, although i don't know if the latter two are available for work.