Kalarippayattu

Taekwondo

Karate

Muay Thai

Sambo

Krav Maga

Wing Chun

Capoeira
Originated in Brazil, Capoeira is unique in the sense that it incorporates music and dance to the martial art. Used by slaves in the 1800s, it was disguised as a form of dance moves to trick slave owners into thinking the practitioners were merely dancing when they were really mastering techniques and sharpening their Capoeira moves. Capoeira is a form of martial art that is considered one of the hardest to counter since its moves are unorthodox yet very lethal. By implementing quick kicks and flowing punches, Capoeira is definitely one of the more unique martial arts globally.
Ninjitsu

The way of the ninja. Practiced by shinobis in ancient Japan, Ninjitsu is considered one of the most unconventional martial arts techniques around the world today. Ninjitsu practitioners in ancient Japan were assassins and spies; hence their methods were based on stealth and taking out an opponent when he does not see it coming. Ninjitsu practitioners are taught various skills and weaponry and are considered guerilla masters of the samurai sword.
Silat
While the origin of Silat is relatively unknown, and the popularity of the martial art is still considered low, what is known is Silat was created by the Malay people in Southeast Asia. Used mainly as a war dance and a form of self defense, Silat practitioners are skilled strikers trained to maintain a strong stance while applying slow and subtle movements with unique dance-like qualities to trick opponents into believing Silat practitioners were ill-trained and hence, making mistakes that Silat practitioners can take advantage of.
Boxing
Boxing

With plenty of martial arts techniques around the globe, a martial artist is definitely spoiled for choice. While there will most definitely be debates with regards to the most deadly martial arts technique known to man, a man who can incorporate several of the above martial arts styles and make it his own would indeed be one of the most dangerous man alive
.