BlueBrick is a free software for Windows/Vista/Win7/Win8,/Win10 (32 and 64bit), developed by Alban Nanty in open source. You can use it for your personal use but not for commercial profit.
This software was designed specially for the AFOLs who want to prepare the layouts of their LEGO® exhibitions. BlueBrick is compatible with LDRAW, “Train Depot Track Designer” and 4DBrix, and was designed with an easily expandable parts database. Its layers feature allows you to better organize your map, and some special layers make annotations and area assignments possible.