Muay Thai Boxing
Muay thai is a lethal strikin art. Uses the 8 point technique, utilizing hands, feet, elbows, knees. Highly telegraphed moves though, so if you are faster, or have techniques for that, such as in Aikido, this isn't as good in my opinion. Very brutal powerhouse art though. Kids train and will kick trees until the trees shake just to toughen up their legs.