Here is a list of sites I recommend for personal study that will help supplement the arts we study in Cali Combat Systems. Quite of a few of these I've trained with the instructors in and some of them I am certified to teach. Others I highly recommend.
Everyone should consider becoming a member of vunak.com / vunak.com. I am a DOM and its worth it. That's Paul Vunaks site if you become a DOM member as a benefit you get access to his annual conferences and access to all his videos and curriculum and you can train with him in person. I am and that is what I do. I also work for him as an assistant when he is teaching IPTP's on occasion. I am a Full Instructor under Sifu Paul Vunak.
The Jun Fan JKD Grappling Association: https://www.jkdassoc.com/shop/. I am an Associate Level Instructor in the Jun Fan JKD Grappling Association under Sifu John Doty.
I have also paid for and been certified with these guys: jkdlessons.com in Chinatown JKD. I am a Senior 2nd Level Coach under Sifu Tim Tackett.
Another one of my instructors who I've had the opportunity to train with is Guro Dan Inosanto at the Inosanto Academy of Martial Arts. I've had the opportunity to train in Jun Fan JKD, Kali, Silat, Muay Thai, Wing Chun and Shoot Wrestling. He has some of his material available for purchase on Gumroad here: https://inosanto.gumroad.com/. I've purchased a majority of the content available there.
Another great one is Guro Burton Richardsons "Silat for the Street" online course which can be found here: https://www.aimfitnessnetwork.com/courses/burton-richardsons-silat-for-the-street he is one of my Instructors and I highly recommend the book that goes to this. Anything he does I recommend. I have purchased all his courses that he has available on BJJ Fanatics which can be found here: https://bjjfanatics.com/search?q=Burton%20Richardson is BJJ For The Street Program that can be found here: https://jkdunlimited.com/products/bjj-for-the-street-white-to-blue-curriculum. I have had a few opportunities to train with Guro Burton Richardson in Knife Defense For The Street, Gun Defense For The Street, Silat For The Street and Battlefield Kali. He is one of my favorite instructors.
Sign up for Tuhon Apolo Ladra's iKali Art of the Blade demo course: https://artofblade.com/ikali-sign-up. I have trained under Tuhon Apolo Ladra since 2015 and his material is a major influence of what I teach when I teach Pekiti Tirsia Kali. I have purchased and trained in his Warrior Kali Double Stick and Single Stick Programs as well as his iKali Blade and P3 Empty Hand courses. And anytime you get to train with him or Grand Tuhon Leo Gaje Jr make every effort to if you can.
Grand Master Bill Clark's, Warrior Krav Maga, can be found here: https://www.warriorbroadcastnetwork.com/krav-maga/ and here: https://www.warriorbroadcastnetwork.com/shop/the-warrior-academy-instructor/. I have trained in Warrior Krav Maga under Master Anthony Landgren and ATA Krav Maga / Tac Krav Maga under Master Anthony Landgren (which I'm a level 1 instructor in under Grand Master Daniel Longoria). Here is a Tac Krav Maga series available at BJJ Fanatics here: https://effectiveselfdefense.com/products/tac-krav-maga-combatives-training-by-daniel-longoria.
I have attended a couple of Guro Daniel Sullivans Filipino Dirtyboxing Panatukan (Inosanto Pananjakman) Instructor Camps. They are fantastic. You can access the Dirty Boxing Measure Stick for free here: https://warriorartsalliance.com/product/measuring-stick/. You should look into his online courses if you can afford them: https://warriorartsalliance.com/product-category/online-course/.
Guro David Seiwert, I've been training with for a few years. I've purchased all his books and all the levels in Kali and Karambit. It's really good material and very affordable. Guro David is very approachable and knowledgeable. You can purchase the latest version of his online courses here: david-seiwert.teachable.com You can register for his Level 1 course for free: https://david-seiwert.teachable.com/p/dfa-kali-level-1-novice/?product_id=513459&coupon_code=DFAKALI1_H-XV8R100OFF&preview
I also have a full membership to Ron Balickis site and I have attended his annual summer camp back in 2018: marsonline.ronbalicki.com/p/full-site-access. He has a solid structured system.
I have also purchased all of Guro Rick Fayes Phase 1 - Levels 1-3 and Phase 2 material on DVD before he put it all online. You can purchase access online here: https://www.mkguniversity.com/bundles/beginning-curriculum. This material highly influences our Phase Method Curriculum. You can take this free MKG Fundamentals course for free: https://www.mkguniversity.com/courses/mkg-fundamentals you should do this, this will help you with what we do. This is similar to what we do but the influences for CCS are Sifu Paul Vunak, Sifu Larry Hartsell's Phase 1-Phase 4 curriculum, Sifu Tim Tackett, Sifu/Guro Dan Inosanto, Guro Burton Richardson, Guro Daniel Sullivan, Tuhon Apolo Ladra, Guro David Seiwert, and some Israeli Krav Maga (WKM/TAC Krav/KMFA).
Also, anything from Pekiti University with Tuhon Jared Wihongi of which I am also a member I highly recommend as well: https://www.pekiti.university
Here is some interesting stuff that comes from students of Dan Inosanto who have developed their own Martial Arts systems. Bob Breen's 4D Combat which blends JKD/Kali, can be found here: https://www.bobbreen.com/courses/4dcombat-online. I have purchased and train his material.
Gilliland Martial Arts head instructor is also certified under Paul Vunak also. I purchased this monthly membership because he has structured his Vunak-Inosanto Kali is well structured the membership is affordable: https://www.martialartsunlimited.net/online-lessons this is similar to the Kali we train.
And Warrior Defense Lab from Andy Norman, full instructor under Dan Inosanto in JKD & Kali, co-founder of Keysi Fighting Method and Fight Choreographer for the Batman Begins and Dark Knight. His material can be found here: https://www.defencelab.com/programs/dl-warrior/.
I am also a certified instructor in Warrior X-Fit under Senior Master Michelle Landgren-Lee, which can be found here: http://www.warriorxfit.com/ and also she certified me in Cage Fitness, which can be found here: https://cagefitness.com/.
Hopefully you can find some of these resources useful in your personal training regime.