This is a start. I think all of the televised official spin-offs which have began filming are listed.
Sasuke
Country: Japan
Affiliation: TBS
Network: TBS
Format: 4-Stage Course
Latest Completed Season: 39
Status: Season 39 aired.
Season 21,
Season 22,
Season 23,
Season 24,
Season 25,
Season 26,
Season 27,
Season 28,
Season 29,
Season 30,
Season 31,
Season 32,
Season 33,
Season 34,
Season 35,
Season 36,
Season 37,
Season 38,
Sasuke 39Kunoichi
Country: Japan
Affiliation: TBS
Network: TBS
Format: 4-Stage Course/3-Stage Course
Latest Completed Season: 11
Status: Season 11 aired.
Season 9,
Season 10,
Season 11American Ninja Warrior
Country: United States
Affiliation: ANW
Network: NBC (Seasons 3-), G4 (Seasons 1-5)
Format: 2-Stage Qualifier Course & 4-Stage Finals Course*
Latest Completed Season: 11
Status: Season 12 airing.
Specials: USA vs Japan, USA vs the World, USA vs the World (II), All-Star Special, All-Star Special (II), USA vs the World (III), Celebrity Ninja Warrior, USA vs the World (IV), All-Star Special (III), Celebrity Ninja Warrior (II), USA vs the World (V), All-Star Special (IV), USA vs the World (VI), All-Star Special (V), Women's Championship
Season 2,
Season 3,
Season 4,
Season 5,
Season 6,
Season 7,
Season 8,
Season 9,
Season 10,
Season 11,
Season 12,
Season 13*Seasons 1-3 used Sasuke as the finals course. Season 12 had a Ninja vs. Ninja Final due to COVID-19 pandemic.
Sasuke Malaysia
Country: Malaysia
Affiliation: TBS
Network: TV2
Format: 2-Stage Qualifier Course
Latest Completed Season: 1
Status: Canceled.
Sasuke Singapore
Country: Singapore
Affiliation: TBS
Network: MediaCorp Channel 5
Format: 2-Stage Qualifier Course
Latest Completed Season: 2
Status: Canceled.
Specials: Singapore vs Malaysia
Season 1-2Ninja Warrior Sverige
Country: Sweden
Affiliation: ANW
Network: Kanal 5
Format: 2-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 2
Status: Canceled.
Season 1,
Season 2Ninja Warrior Turkiye
Country: Turkey
Affiliation: ANW
Network: TV8
Format:
Latest Completed Season: 1
Status: Canceled.
Season 1Ninja Warrior UK
Country: United Kingdom
Affiliation: ANW
Network: ITV
Format: 2-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 5
Status: Canceled.
Specials: Text Santa
Season 1,
Season 2,
Season 3,
Season 4,
Season 5X-Warrior: Sasuke China
Country: China
Affiliation: TBS*
Network: JSTV
Format: 2-Stage Qualifier Course & International Tournament
Latest Completed Season: 1
Status: Canceled.
Season 1*Not originally affiliated. Bought rights after litigation threatened.
Không Giới Hạn - Sasuke Việt Nam
Country: Vietnam
Affiliation: TBS
Network: VTV3
Format: 4-Stage Course
Latest Completed Season: 5
Status: Season 5 aired.
Specials: Đội Việt Nam và Đội Quốc Tế [Team Vietnam vs Team International], Đội Việt Nam, Đội Nhật Bản và Đội Quốc tế [Team Vietnam vs Team Japan, vs Team International], Green Team, Ninja PT và Eagle Team [Green Team vs Ninja PT vs Eagle Team]
Season 1,
Season 2,
Season 3,
Season 4,
Season 5Danmarks Ninja Warrior
Country: Denmark
Affiliation: ANW
Network: Kanal 5
Format: 2-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 1
Status: Canceled.
Season 1Sasuke Ninja Warrior Indonesia
Country: Indonesia
Affiliation: TBS
Network: RCTI
Format: 2-Stage Qualifier Course & 4-Stage Finals Course
Latest Completed Season: 2
Status: Canceled.
Specials: Special Misi Operasi Midoriyama [Special Mission Operation Midoriyama], Special Misi Operasi Midoriyama II [Special Mission Operation Midoriyama II], Polri [Police Special], International Competition
Season 1,
Season 2Team Ninja Warrior (Season 1-2)/American Ninja Warrior: Ninja vs. Ninja (Season 3-)
Country: United States
Affiliation: ANW
Network: Esquire (Season 1), USA (Season 2-)
Format: Tournament of 3-Person Teams
Latest Completed Season: 3
Status: Canceled.
Specials: College Madness
Season 1,
Season 2,
Season 3Ninja Warrior, Le Parcours Des Héros
Country: France
Affiliation: ANW
Network: TF1
Format: 2-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 5
Status: Season 5 aired.
Specials: Dans les Coulisses du Parcours [Behind the Scenes of the Course]
Season 1,
Season 2,
Season 3,
Season 4,
Season 5Ninja Warrior Germany
Country: Germany
Affiliation: ANW
Network: RTL
Format: 2-Stage Qualifier Course & 3-Stage Finals Course (Season 1)/3-Stage Qualifier Course & 3-Stage Finals Course (Season 2-)
Latest Completed Season: 6
Status: Season 6 aired.
Specials: Das Phanomen [The phenomenon], Promi-Special [Celebrity Special], Promi-Special (II) [Celebrity Special (II)] , 4 Nationen Special [4 Nations Special]
Season 1,
Season 2,
Season 3,
Season 4,
Season 5,
Season 6Team Ninja Warrior Danmark
Country: Denmark
Affiliation: TNW
Network: Kanal 5
Format: Tournament of 3-Person Teams
Latest Completed Season: 1
Status: Canceled.
Season 1Ninja Warrior Italia
Country: Italy
Affiliation: ANW
Network: NOVE
Format: 3-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 1
Status: Canceled.
Season 1Ninja Warrior بالعربي
Country: Egypt
Affiliation ANW
Network: ON Ent
Format: 4-Stage Course
Latest Completed Season: 1
Status: Season 2 announced.
Season 1Australian Ninja Warrior
Country: Australia
Affiliation: ANW
Network: Nine Network
Format: 2-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 5
Status: Season 5 aired.
Specials: State of Origin, Record Breakers
Season 1,
Season 2,
Season 3,
Season 4,
Season 5Ninja Warrior NL
Country: Netherlands
Affiliation: ANW
Network: SBS6
Format: 2-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 1
Status: Canceled.
Season 1Ninja Warrior España
Country: Spain
Affiliation: ANW
Network: Antena 3
Format: 2-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 2
Status: Canceled.
Season 1,
Season 2Ninja Warrior Hungary
Country: Hungary
Affiliation: ANW
Network: TV2
Format: 3-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 2
Status: Season 2 aired.
Season 1Ninja Warrior Austria
Country: Austria
Affiliation: ANW
Network: PULS 4
Format: 2-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 2
Status: Season 3 airing.
Season 1Русский ниндзя
Country: Russia
Affiliation: ANW
Network: CTC (Seasons 3-), Первый канал (Seasons 1-2)
Format: 2-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 3
Status: Season 3 aired.
Season 1Team Ninja Warrior Germany
Country: Germany
Affiliation: TNW
Network: RTL
Format: Tournament of 3-Person Teams
Latest Completed Season: 2
Status: Season 2 aired.
Specials: Promis auf dem Parcours [Celebrities on the Course]
נינג'ה ישראל
Country: Israel
Affiliation: ANW
Network: Keshet 12
Format: 2-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 3
Status: Season 4 airing.
Specials: VIP (I), VIP (II), VIP (III), נינג'ה אולסטארז [Ninja All-Stars]
Season 1,
Season 2Ninja Warrior Romania
Country: Romania
Affiliation: ANW
Network: Pro TV
Format: 3-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 1
Status: Season 1 aired.
Season 1American Ninja Warrior Junior
Country: United States
Network: Universal Kids
Format: Tournament with 3 Age Groups
Latest Completed Season: 3
Status: Season 3 aired.
Season 1,
Season 2,
Season 3Ninja Warrior Switzerland
Country: Switzerland
Affiliation: ANW
Network: TV24
Format: 2-Stage Qualifier Course & 3-Stage Finals Course
Latest Completed Season: 2
Status: Season 2 aired.
Specials: Promi-Special [Celebrity Special]
Season 1Ninja Warrior Polska
Country: Poland
Affiliation: ANW
Network: Polsat
Format:
Latest Completed Season: 4.
Status: Season 5 airing.
Season 1Монгол НИНЖА Дайчид
Country: Mongolia
Affiliation: TBS
Network: MNB
Format:
Latest Completed Season: 1.
Status: Season 1 aired.
נינג'ה ישראל ילדים
Country: Israel
Affiliation:
Network: ערוץ הילדים
Format:
Latest Completed Season: 1.
Status: Season 1 aired.
Ninja Warrior Germany Kids
Country: Germany
Affiliation:
Network: Toggo
Format:
Latest Completed Season: 2
Status: Season 2 aired.
Announced Shows:
Ελληνας νίντζα πολεμιστής
Country: Greece
Network: ANT1