Krav Maga is a military self-defence and fighting system developed for the Israel Defense Forces and Israeli security forces derived from a combination of techniques sourced from boxing, wrestling, aikido, judo and karate, along with realistic fight training.
Filipino Martial Arts (Kali / Eskrima) is an extremely effective and battle-tested weapons-based system. The bulk of your training in this art will be with weapons such as the stick, knife, and empty-handed (weapon vs. no weapon).
BJJ FST self defense approach to grappling, takes a more intricate look at knife attacks, gun threats and multi attacker scenarios while defending and countering form the ground. This is not sport BJJ although most techniques are similar the street application and concepts are slightly different.