The WK modding kit contains a set of tools for viewing and modding game files, including:
BCP extractor and packer
3D Mesh viewer
Blender addon to import/export Mesh3/Anim3 files
Download: https://github.com/AdrienTD/wktools/releases
Source code: https://github.com/AdrienTD/wktools
wkbre is a level/savegame editor.
You can modify the terrain, place units/buildings etc.
Download: https://github.com/AdrienTD/wkbre/releases/latest
Source code: https://github.com/AdrienTD/wkbre
This is a third party patch which improves both WK 1.4 and WK-B 1.23 with:
compatibility fixes: Fix low framerate and freezes when music is on.
bug fixes: there is no more unit warping/teleportation and no more sight range bugs (watchtowers always work, Rescue Tomas barbarian attack now always working, etc.)
modding capabilities: "data" directory, patch BCPs in first WK, custom campaigns/maps, access to map editor in WKB, trace actions
"Dioxygen" map to demonstrate the usefulness of the patch in modding
Download: https://github.com/AdrienTD/WK-UniversalUnofficialPatch/releases
Source code: https://github.com/AdrienTD/WK-UniversalUnofficialPatch
Discussions: http://steamcommunity.com/groups/WARKC/discussions/0/1319961618834033179/