: A complete open-source suite for schematic capture and PCB design.
If you need a free simulation tool without time limits or upcoming expiration, consider these alternatives: Multisim Free Download
: High-performance SPICE simulation, widely used in industry. : A complete open-source suite for schematic capture
NI Multisim does not have a permanently free full version for desktop, but you can access its features through the following official channels: Multisim Free Download
: National Instruments typically offers a 7-day or 30-day free trial of the full desktop software suite for evaluation purposes on the NI Multisim product page. Free Alternatives