Here is a list of tools which will help you with creating your next thinBASIC script. If not specified otherwise, the author is Petr Schreiber, so in case of problems just contact me at address in About section.
OBJ to M15 Conversion tool to convert Wavefront OBJ files to TBGL compatible M15 format.
Tested with Blender, Wings3D and ZBrush exported files.
Under continuous development.
Blender M15 Exporter by Michael Hartlef Great export plugin for Blender modeler with nice GUI and lot of options.
Under continuous development.
BMP to M15 heightmap Tool to convert grayscale bitmap to M15 mesh, features optional UV coordinates generation.
Under continuous development.
M15 Utils by Kent Sarikaya Tool which reports number of vertices and polygons in M15 files (separate numbers for quads and triangles).
Under continuous development.