3D Modeling packages
A free 3D modeling and rendering suit, can be used for creating both karts and tracks:
A free 3D modeling package, especially focused on mesh modeling. Mesh made in wings have been found to cause trouble when imported back into blender (since we only have a blender export script)
Import/Export Plugins for Blender
Blender Track Export Script
Export script that not only exports the 3d model of the track, but also the TrackTopology and the location of Specials and a lot more, see the separate track exporter page for details. This version of the track exporter only works with 0.7 alpha2 (and newer) versions of STK, and needs the b3d blender export script (see below).
Blender Kart Export Script
This script exports karts, including wheels and configuration file, see making kart tutorial. This version only works with 0.7 alpha2 (and newer) versions of STK, and also need the modified b3d blender export script.
Modified b3d blender export scripts
A modified version of the blender b3d exporter. You have to use this version of the b3d exporter. The version is fully backwards compatible, so you can simply replace an existing b3d exporter.
Blender STK Browser
A redesign of the ID Property browser which can be used to set STK specific values in Blender. It only suggest values which are logical in the current context. This makes tuning your track very easy indeed! Please follow the instructions on how to use the browser. N.B. The current version is a development version. Please make sure you have the latest version installed.
Blender Driveline Import Script
This script allows you to load a driveline into Blender in case you want to tweak a driveline. You will have use it twice, one for the .drvl file and another for the .drvr .
Script to load and save Wavefront (.obj) files exported by Wings3d, currently the only way to export from Wings3d into Blender and vice versa.
Wings 3D Import/Export
These python scripts should give you an opportunity to import to and export from Blender to Wings 3D.
These python scripts should give you an opportunity to import to and export from Blender to 3DS.
Planar Quads Script
This script should allow surfaces to be flattened and smoothed to the desired degree (written by request for IngoRuhnke).
GIMP (The GNU Image Manipulation Program)
An OpenSource (GPL) 2D paint program that can be used to draw textures and other 2D images:
A free, open-source painting program similar, but better than MS Paint. Runs on Windows only.
An excellent lightweight image editor for MacOS X.
A 'digital audio workstation' for Linux.
An audio and MIDI sequencer, score editor, and music composition and editing environment. For Linux, MacOSX and FreeBSD.
A drum machine for GNU/Linux.
A simple Free sound editor and recorder.
A free cross-platform '.mod' file editing package.