Creme de Cacao Blanc 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 white ("blanc") expression as opposed to the brown ("brun").
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.