The best CAD alternative to LTspice is KiCad, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to LTspice and four of them are CAD Software so hopefully you can find a suitable replacement. Other interesting CAD Software alternatives to LTspice are Altium Designer, Circuit Solver Web and Livewire.
KiCad is an open source software suite for electronic design automation (EDA) - designing schematics of electronic circuits and printed circuit boards (PCB). KiCad is developed by Jean-Pierre Charras. And features an integrated environment between schematic capture, bill of...
Features a unified workflow for schematic capture, PCB layout, mixed analog/digital simulation, signal integrity analysis, real-time 3D editing, ECAD-MCAD collaboration, component libraries, collaborative design tools, BOM generation, routing, and manufacturing outputs.
Circuit Solver is an electronic circuit simulator. You drag your electrical components and place them on one at a time. You hook up some sources and you place some meters to read the values.
Livewire is a sophisticated software package for designing and simulating electronic circuits.
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Kicad is primarily for PCB layout. And it is great for that.