JSF stands for:
- Java Server Faces, a framework standard for Web applications.
- Jabber Software Foundation, the former name of the XMPP Standards Foundation.
- Joint Strike Fighter is a designation for aircraft within the American warplane Development Program Joint Advanced Strike Technology, for which the Boeing X -32 and Lockheed Martin X-35 was built as a test pattern. It eventually led to serial production of the F -35 Lightning II