Chili Oil / Crisp / Paste / Sauce
See this post by @ceryl and the preceding post by @tati for a homemade recipe
@ionchy recommends Lao Gan Ma for a store-bought alternative
@pc98jr recommends Sambal Oelek
@wwklnd recommends Zao Lajiao
Mexican/Mexican-style sauces
@MayaGay and @ceryl recommend Valentina Black Label
@spineflu recommends El Yucateco Green Habanero
@furry-hater recommends Tapatío
@NineAlex recommends Cholula (standard, chili garlic, and chipotle flavors)
@aidan recommends Trader Joe's Organic Spicy Taco Sauce
Caribbean
@masklayer recommends Grace Hot Pepper Sauce
@Velyn recommends Pique de Piña
@Webster recommends Rude Boi
Louisiana-style
@aidan recommends Crystal
@AE-et-al and @NireBryce recommend green Tabasco (the jalapeño flavor)
Local
@deafhobbit recommends Cry Baby Craig's (Minnesota)
@whit recommends the Green and Ginger sauces from Hot Sauce Nashville
@BunchesOfBees recommends Brightside Foods' Habanero hot sauce (Vancouver)
@BunchesOfBees recommends SaltSpring Kitchen's Morita + Espresso + Chipotle sauce (Vancouver)
Other
@Catfish-Man, @Keloti, and @whit recommend Marie Sharp's
@amypercent and @vogon recommend Secret Aardvark Habanero
@amypercent recommends The Pepper Plant Hot Sauce
@Pr0mptCr1t1cal recommends Frank's RedHot (lime flavors)
@furry-hater recommends Sriracha (though I believe there's a shortage right now)
@davin recommends Bitchin' Sauce (Heat)
Never leave home without it.