LRailplan是一款专业的铁路平纵横设计一体化软件，覆盖新建和改建铁路全项目类型。全过程项目化管理，单元法定线，支持既有线平纵拟合重构、自定义横断面设计、点云建模等。适用于铁路、地铁等项目的线路设计。工欲善其，必先利其器！

BackToCAD Publisher is a stand-alone converter that allows the CAD user to convert hundreds of DWG/DXF, ACIS (SAT), PRC files into 2D PDF, 3D PDF, and PRC (3D PDF or CAD Input).

A simple 2D maze generation app. Can also be used to generate random hatch patterns.

Simple command line interface for adding/removing Autodesk® Civil 3D® Cogo points to/from a point group.

Draws markers at user-selected locations along Autodesk® Civil 3D® Alignments, Profile Views, Sample Lines, and Section Views.

Set up real-time rendering between Autodesk® AutoCAD® and Lumion, and your architectural rendering workflows will never be the same again.

Pipe Network Alignments, Profiles, and Profile Views will be generated from Excel inputs (Start structure, End structure, and Alignment name).

Convert polylines into corridors (while including property sets)

Tools to unfold a 3D paper model and create cutouts

JTB TimberTool makes it easy to convert closed polylines into mass elements and makes the bounding box width and depth correct for scheduling purposes.

JTB TimberTool makes it easy to convert closed polylines into mass elements and makes the bounding box width and depth correct for scheduling purposes.

PCC is a plugin for Autodesk® Civil 3D® that streamlines the process of checking pipeline crossings, saving valuable time and effort. It identifies soft and hard clashes during the modeling process.

A set of tools extends Autodesk® AutoCAD® standard point cloud cropping functions.

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.

PVC 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. Includes 117 flanged and socket valves.

Fix scribe texts in steel plate dxf files.

This program introduces two new 3DSolid edition commands: STRIM that subtracts overlaps without deleting the trimming solid, and SSPLIT that creates separate solids out of any overlapping portion.

Imports.OBJ mesh files into Autodesk® AutoCAD® as PolyFace mesh objects.

Create Flexible HVAC Ducts dynamically.

Creates 3D steel saddles for horizontal vessels.

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

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

Iron 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. Also, these valves are realistic-looking.

Carbon Steel Buttweld Fittings 3D App will revolutionize the way you do 3D Piping drawings. The Pipe Spool feature makes it easy to add a pipe segment with selected starting and ending fittings.