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
See also LIE (disambiguation)