Blender 2.8 Export-Import Plugin
Blender 2. 8 plugin for working with .p3d models.
Crashday Smart Launcher
A better CD launcher for managing mods. Adds collections, easy steam import, searching, etc.
Old SDK Tools
This are the tools made for original Crashday release. None of them are tested for the new game, but you may be able to work something out. Also includes source files of old makep3d, which can help with making custom export plugins.
download: crashday_dev_tool.zip
3d Map Editors
Creating Crashday tracks is really fun. But you know what is more fun? Creating them in 3d and being able to edit heightmaps without any paint hassle. Here are your two options:
3D Map Editor by FlyX
3d Map Editor by Wurunduk (outdated, can be used for code reference)