The script DRduplicate duplicates an object along a curve. It uses the pathAnimation and the objects get attached to the curve, so if you modify it, the objects will follow. There is also the option (for Polygons only) to instance the copies – so if you modify the original your instanced copies will change too. You can now choose to copy with a certain distance between the copies or by number.
The selected curve is measured and the length is displayed. If your curve has a length of 45cm and you choose of 4.6cm you get 9 copies.
You can copy any geometrie – but the instance-command will only work on polygons!

Its still a bit buggy but its working!

Have fun and let me know if you like it or if there is something i can improve.