Bujinkan. Headed by Soke Hatsumi, it combines 9 ryu including 6 Samurai schools and 3 ninpo schools. Eclectic, with a rich tradition, yet very pragmatic.
Pa Kua Chang - One of China's 3 internal martial arts (the other two being Tai Chi Ch'uan and Hsing-I Ch'uan). Stunningly effective evasion, with powerful palm strikes for offense. Takes a while to learn.
Capeoira - Brazilian martial art. You've probably heard of it before, looks like breakdancing, practiced to rhythmic music. http://www.spiritonin.com/capoeirafighter/ is a free, flash game of it.
Pentjak Silat - An umbrella term for Indonesian martial arts that actually covers almost as many separate styles as Kung Fu. Some of them teach the use of flexible weapons--traditionally a sarong, but more modern equivalents like your shirt would work. Make nearly anything a weapon.
Those are a few of my favorites. Plenty more that I like, of course.