This is a Group Node made with Blender 3.1 Geometry Nodes that allows you to align geometry along a curve, just like the Curve Modifier
For more information watch: https://www.youtube.com/watch?v=vYXeqwqauzE

Updates:

v 1.0 - original version from the Youtube video
v 2.0  - added checkbox to make the curve also visible
         - added checkbox for stretching the object to fit along the full length of the curve