A green-bladed lightsaber was wielded by Nautolan Jedi Kit Fisto prior to and during the Clone Wars. Fisto's blade saw action on a large number of battlefields against the CIS Armed Forces, such as the Geonosis, Mon Calamari and Ord Cestus.

Kit Fisto met his end when Darth Sidous, the very man he had "protected" a few days before, cleaved into his stomach

Source: Starwars.wikia.com