https://sites.google.com/site/cosiopentransportation//home/open-source

Most organizations these days own at least a few vehicles for various purposes. A construction company would have several trucks and tractors while a travel agency might own several vans and multi purpose vehicles (MPVs). Just like equipments in the office such as printers and servers, vehicles too...

http://www.capterra.com/trucking-software/

http://sourceforge.net/projects/daybookaccounts/?source=directory

http://sourceforge.net/projects/carrentalsystem/?source=directory

http://sourceforge.net/projects/inventorymanagementsystem/?source=directory

http://sourceforge.net/p/krystaldms/code/ci/master/tree/krystalce/DMS%20Server%20-%20Community%20Edition%202015/src/com/primeleaf/krystal/web/