Most interesting in 3D Modeling

Free
It allows you to write extensions to the FBX plug-ins in a modular manner
Trapcode 3D Stroke Studio helps create 3D Strokes, paths, logos, and lines with glowing, tapering, and complex motion in 3D space
Free
This design can then be optimised or scaled to suit particular requirements
DriveWorksEZ® is a software system for creating custom drive functionality for G7 drives
Create and update drilling and blast mining plans

Top rated in 3D Modeling

Allegorithmic Substance Player
Free

Experiment with substances and read relevant data

SU Podium
Free

It is a photo-realistic rendering program designed for SketchUp

Marmoset Toolbag
Free

Edit and render models of materials and objects

SCARM
Free

Create models of railroad track plans and layouts

3DVIA for Photoshop CS5 Plug
Free

Create stunning and unique pieces, enriched with stylized 3D content

IGS Viewer
Free

IGS Viewer allows viewing 3D CAD models provided as IGS and IGES files

JewelCAD Pro
Free

A professional environment for design and modeling

TopoGun
Free

Create, modify, manage, and export 3D models

CopperCube
Free

Create 3D games and apps for Windows, Mac, Android, and the web

3DVIA Shape for Maps
Free

Use the Earth as a starting point to bring your ideas to virtual life

Mastercam X4
Free

Designs and develops products and machine tool items

spColumn
Free

Analyzes and designs infrastructural objects

Autodesk Design Review DGN
Free

DGN Import is an Add-in for Autodesk® Design Review

Circuit Shop
Free

Circuit Shop allows you to design electronic circuits

Chief Architect X2
Free

Design commercial and residential structures and buildings

BetterWMF
Free

Manages copied and pasted drawings in AutoCAD

SolidWorks Enterprise PDM
Free

SolidWorks Enterprise PDM is a full-featured data management solution

Autodesk FBX SDK
Free

Autodesk FBX - data exchange between several Autodesk content creation packages

PowerWorld Simulator GSO
Free

Manage, view and exchange power flow cases

ProSim Ternary Diagram
Free

Automatically creates and adjusts ternary diagrams