You can download the software and its original supporting paper through the following sources: Software Downloads
However, for ease of use and immediate visual output, the original executable file remains the preferred choice for most students and consultants.
Option 2: Academic & Research-Focused (Best for ResearchGate or Forums) Free Tool for Rapid Grain Size Distribution Analysis
It uses the popular graphical method, though later versions also include Inman (1952) parameters. The software accepts data in phi (φ) intervals and outputs statistical summaries, making it invaluable for interpreting depositional environments.