There are several niche software projects with "Arachne" in the name, including: A micro-framework for web development.
If you are looking for the historical web browser, version is an extremely early release (dating back to the mid-90s). More stable and common versions include 1.90 or 1.97 . Arachne-0.3.zip
Occasionally used for small indie tools or game assets. Seams Issue with Arachne – PrusaSlicer – Prusa3D Forum There are several niche software projects with "Arachne"