Cajuns are an ethic group mainly living in Louisiana (where New Orleans is). Of course, food culture in New Orleans are called cajun food. Cajun Dishs tend to be rural, more seasoned, sometimes spicy, and tens to be more hearty.
Of course, chili sauce plays major role here in New Orleans. Outstanding brand of chili sauce produced in Louisiana is Tabasco Sauce.
Tabasco sauce is a brand of hot sauce made from tabassco peppers (Capsicum frutescens var. tabasco), vinegar, and salt, and aged in white oak barrels for three years. It was produced by McIlhenny Company of Avery Island, Louisiana since 1868. Several new types of sauces are produced under the naame Tabasco Sauce including jalapeno-based green, chipotle-based smoked, habanero, garlic, and "sweet and spicy" sauces. McIlhenny also produces a Tabasco soy sauce and Worcestershire sauce. In addition, Tabasco also has merchandising products (starting from T-- as we may see in all tourist area & airport outlet.
However, there are also other brand of chili / hot sauce selling on shelf (not in supermarket but on souvenir shop) -- It appears to be strange name but communicated on hot taste...