Creme de Cacao Brun is one of their classic liqueurs, this made with roasted cocoa beans. They say it has an intense aroma and chocolate and vanilla notes. This is the brown ("brun") expression as opposed to the white ("blanc").
Giffard is a French company specializing in a wide variety of liqueurs and eua-de-vie among other products. Some of those extra products are flavored cocktail syrups (or "sirop"). They are generally sweetened with pure cane sugar.