BVE Cornwall hosts several utilities for use by BVE & OpenBVE Developers. These are:
TrackGen generates smooth curves and pointwork for OpenBVE. It can also generate platforms.
Platform Nameboard Generator
As the title suggests, this will generate platform nameboards for you!
CylinderGen is designed to generate smoothed cylinder objects for use in OpenBVE.
Curved Object Spreadsheet
This is a much older utility created by Sanford Mace (smace), and is designed to create a curved object from a supplied object segment.