Many third parties have created tools and other resources for developing OpenBVE addons. A brief list of these is below:
Note: Please see the respective pages for any licence conditions.
Track and Railway Structures:
TrackGen
TrackGen creates smoothly curved track (including pointwork), platforms and bridges.
http://www.bvecornwall.co.uk/wordpress/trackgen/
Scenery
Forest Builder
Forest Builder generates forests, carparks etc.
http://www.bveklub.hu/forestbuilder/
Object Resources
BVE Klub Object Library
Various objects, including Hungarian trains, and more general scenery items.
http://bveklub.hu/objektumtar/
BVE Cornwall Objects
Assorted British rolling stock, buildings and cars.
http://www.bvecornwall.co.uk/wordpress/objects/
Freebies’
Assorted road traffic