Tea tree oil

Tea tree oil contains 'terpenoids', which have been found to have antiseptic, antifungal and antimicrobial activity. Tea tree oil is known to be effective in treating Fungal Infection of the Toenails and other skin conditions...

More info here:
http://altmedicine.about.com/od/herbsupplementguide/a/TeaTreeOil.htm

http://thestar.com.my/lifestyle/story.asp?file=/2010/11/23/lifefocus/7413105&sec=lifefocus

http://thestar.com.my/lifestyle/story.asp?file=/2010/11/23/lifefocus/7403969&sec=lifefocus