This program written in Scilab can be used for solving plane stress small strain elasticity problems. It utilizes traingular elements with linear shape functions. The program is provided under the terms of the GNU General Public License (GPL). If you use this program for education or research please give the proper credit. If you used this program in your published material (book, article, report, etc.) please cite the following reference paper: Suchocki C., Development of courseware for plane stress linear elasticity problems utilizing free scientific software, International Journal of Mechanical Engineering Education, pp. 1–18, 2025, DOI: 10.1177/03064190241312560