SLFFEA stands for San Le's Free Finite Element Analysis. It is a package of scientific software and graphical user interfaces for use in finite element analysis. It is written in ANSI C by San Le and distributed under the terms of the GNU license. What SLFFEA includes 15 of the basic finite element types: 3-D 2 node beam 3-D 8 node brick 2-D 3 node plate 2-D 4 node plate 3-D 3 node plate with memb