CCAD
Pfast
Trial versionPfast 2.1: Streamline Hole and Fastener Creation in AutoCAD
WindowsSurfText
Trial versionDraw and edit surface texture (finish) symbols.
WindowseDucts
Trial versioneDucts Simplifies Round Ductwork Design in AutoCAD
WindowsSteel Shapes for AutoCAD
Trial versionAutoCAD Tool for Drawing Steel Shapes
WindowsWeldsym
Trial versionAutoCAD Tool Simplifies Welding Symbol Creation
Windows