BVE Cornwall hosts several utilities for use by BVE & OpenBVE Developers. These are:

TrackGen
TrackGen generates smooth curves and pointwork for OpenBVE. It can also generate platforms.
http://www.bvecornwall.co.uk/wordpress/trackgen/

Platform Nameboard Generator
As the title suggests, this will generate platform nameboards for you!
http://www.bvecornwall.co.uk/wordpress/platform-nameboard-generator/

CylinderGen
CylinderGen is designed to generate smoothed cylinder objects for use in OpenBVE.
http://www.bvecornwall.co.uk/wordpress/cylinder-generator/

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.
http://www.bvecornwall.co.uk/wordpress/curved-object-spreadsheet/