CCAD
Pfast
Trial versionDraws ANSI & Metric holes, threads, pipe threads and fasteners in AutoCAD.
WindowseDucts
Trial versionDraw duct runs, elbows, transitions & reducers for round duct work in AutoCAD.
WindowsSurfText
Trial versionDraw and edit surface texture (finish) symbols.
WindowsWeldsym
Trial versionDraw welding symbols in AutoCAD.
WindowsSteel Shapes for AutoCAD
Trial versionDraw End, Side and Top views of common steel shapes.
Windows