LibreCAD is an open-source cross-platform 2D CAD program, which is translated in over 30 languages.
LibreCAD is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
License: https://www.gnu.org/licenses/gpl-2.0.html
Source:...
...Math is also capable of drawing standard functions using graph dialog window to help with visualization functions, results, or approximation with given points and much more. All data can be exported in most common formats like PDF, PNG, TXT, etc.