App for Autodesk® AutoCAD® makes it easy to create or draw a catenary curve as a polyline by specifying the start and end point and the length/immediate point/sag and optionally a diameter(width).

JTB DimNotes makes it easy to add dimension notes to dimension objects in Autodesk® AutoCAD®.

Show the DWG and DXF version and properties and metadata in Explorer columns or in file dialog boxes within Autodesk® AutoCAD® or other applications.

DWG Columns freeware shows the DWG and DXF version in Explorer columns or in file dialog boxes within Autodesk® AutoCAD® or other applications.

Connect fields to Excel cell values. You can have Excel as the main source and when it is updated your drawings will be updated too. You can place fields in texts, mtexts, tables, and attributes.

Drawing Windows Colors changer for OSNAPZ.

This app can be used with Autodesk® AutoCAD® to enable the OFFSET command to work with externally referenced drawings, blocks, and lines within associated arrays, dimensions, and tables.

Manage drawings with many layouts more easily in a palette

Quickly renumber and insert the total number to the sheet set to show them up in fields [Sheet number]/[Total Number] in your title block.

Convert all raster images in drawing(s) to OLE objects, it's like binding external image references.

JTB Quick Perspective for Autodesk® AutoCAD® will transform Points, Lines, straight Polylines, and "landscape" Blocks to perspective view drawing, all in 2D working space.

App to quickly copy a rectangular window of selected objects out from your drawing, and trim everything outside the window's edges. The result can be copied to the current drawing or to the clipboard.

App to simplify layer override settings within viewports.

JTB XClipClean is an Xclip-cutter app for Autodesk® AutoCAD® to clean up xrefs or blocks that have been clipped so that the information that is outside the clip is removed.

You can insert text bubbles to lines, curves, or draw leaders with it, or quickly make a schedule from text bubbles and/or other blocks.

An app to batch change or fix file paths and names of external references in drawings. Supports Xrefs, Datalinks, Raster Images, PDFs, DWFs, and DGNs.

Powerful spreadsheet app to batch edit attributes of blocks across multiple drawings.

Calculate tie-in points faster, easier, and with fewer errors

Steel Valves 3D allows the user, without having to change the UCS to easily place valves in various 3D views by selecting one of the toggles on the dialog. Very realistic looking set of valves.

Steel Valves 2D allows the user to easily place valves in various 2D views by selecting one of the toggles on the dialog. Realistic looking set of valves.

MI150 3D App inserts Malleable Iron threaded pipes and fittings in three different 3D views: Plan, Turned Up, and Turned Down. It can be used for fire and sprinkler applications.

No Hub 3D Piping System inserts pipe and fittings in three different 3D views, Plan, Turned Up, and Turned Down.

Pumps2D combines all three pumps, Base Mounted End Suction, Horizontal, Split Case, and Vertical In-Line all in one App. Individual Apps for each pump may be purchased separately.

SV Hub & Spigot 3D Piping System inserts pipe and fittings in three different 3D views - Plan, Turned Up, and Turned Down.