zScatterToCrv scatters copies of the selected objects along a path curve. It supports random scale and rotation, an offset to the sides of the curve, and collision avoidance.

Quick start

Run zScatterToCrv.
Select the objects to scatter.
Pick the path curve.
Adjust DISTRIBUTION and TRANSFORMATION.
Bake creates the copies. Cancel discards them.

DISTRIBUTION

Alignment: Normal (follows the curve normal) or World Z (always stays upright).
Mode: By Spacing (fixed spacing) or By Count (fixed number).
Value: the spacing or the count, depending on Mode.
Seed: controls only which object each position takes from the pool of source objects (the pool pick). It has its own re-roll button and is independent of the Scale, Rotate and Offset seeds below.
Avoid Collision: on by default. A position that would collide is skipped.

TRANSFORMATION

The tool always scatters to both sides of the curve. There is no one-sided or two-sided mode to choose.

Offset (a checkbox plus a maximum distance, off by default): when on, each copy picks a random side of the curve, up to that maximum distance. It has its own seed and re-roll button.
Scale (a checkbox plus a two-handle range, off by default): it has its own seed and re-roll button.
Rotate (a checkbox plus a two-handle angle range, off by default): it has its own seed and re-roll button, independent of the Scale seed.

How the settings work together

Seed, Scale, Rotate and Offset each have their own random seed. Re-rolling one does not change the result of the other three.

Good to know

Without Avoid Collision, no placement is rejected for collisions. With it on, a position that hits something is skipped.
A curve that fails to parameterize is skipped silently and does not stop the other curves from scattering.