Li3

Li3 or LI3 may refer to:


 * Li3 (software), a full-stack web framework for producing web applications
 * Lithium (3Li), an isotope of oxygen, a chemical element with symbol Li and atomic number 3
 * Lithium-3 (Li-3 or 3Li), a hypothetical isotope of lithium with no neutrons
 * "Trilithium", a fictional chemical compound in Star Trek
 * "Less interesting three" (LI3), nickname for Aerosmith members Tom Hamilton, Joey Kramer, and Brad Whitford (those not in the "Toxic Twins")
 * Li-3 GmbH (Li-3 GmbH) Company in Germany