WIS-NeuroMath - is a software tool for automated analysis and quantification of fluorescent microscopy images of Nerve cells, in both in vivo and in vitro preparations. It allows for accurate detection of neurites in challenging images. Following neurite detection, different types of processing can be carried: Cell Morphology of cultured neurons, Neurite Length Analysis and Ganglion Explant Analysis. Usefull also for angiogenesis analysis.

has function

Plugin designed to allow easy semi-automatic tracing of neurons or other filament-like structures (e.g., microtubules, blood vessels) through either 2D images or 3D image stacks. Data can be imported and exported in SWC files for interaction with other software, or details of the traces can be exported as CSV files for analysis in spreadsheets or statistical software.

This plugin is included in Fiji by default.

A usage instruction is available here:
Tracing Neurons using FIJI (ImageJ)