| Need | Recommended Solution | |------|----------------------| | 2D/3D design | FreeCAD, LibreCAD, Onshape (free tier) | | Accounting | GnuCash, Odoo Community Edition | | Office suite | LibreOffice, OnlyOffice | | ERP for small business | Dolibarr, ERPNext |

Click "Start," open your target application (like Excel), and press the button on your physical device to send the value. Licensing Terms to Remember 232key RS-232 software | Plus license