Originally I used Draft Choice for Windows until an upgrade of my computer and operating system made it unreliable. (It was, after all, originally designed for Windows 3x)
Tried TurboCad but couldn’t get on with it. Looked at various others but found them too expensive or the trial time too limited.
Then found DesignCad Pro 2000 going cheap enough to risk. Eventually updated to DesignCad 3D Max V.17 which cost about £25 via Ebay. Similar sort of usage to Draft Choice which made the conversion easy. Both programs are 2D/3D and very easy to learn. Fully recommended especially if a late, but updated version, eg V.17 or 18, can be found reasonably cheap. Possible only down side is that the help system for V.17 is poor. That for ‘2000’ was superb. I understand that V.18 help system has been improved.
Incidently, DesignCad is now marketed by the same company as TurboCad, ie IMSI, however, their marketing seems pointed at TurboCad so finding DesignCad can be a bit difficult.