* Lactase (breaks down lactose into glucose and galactose)
* Maltase (breaks down maltose  into 2 glucoses)
* Sucrase (breaks down sucrose into glucose and fructose)
* Trehalase (breaks down trehalose into 2 glucoses)
<br />For a thorough scientific overview of small-intestinal disaccharidases, one can consult chapter 75 of OMMBID.  For more online resources and references, see inborn error of metabolism.