Downloading Ngraph-gtk 6.06.14 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. Ngraph.exe is the frequent file name to indicate the Ngraph-gtk installer.
This free program is an intellectual property of Satoshi ISHIZAKA. The program relates to Office Tools. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The most popular versions among the program users are 6.6 and 6.0.
From the developer:
Ngraph-gtk is an open source program that enables you to create scientific 2-dimensional graphs for researchers and engineers. The program allows you to export the graphs to PostScript, SVG, PNG or PDF format. You can insert text, geometrical figures and parabolas.
You may want to check out more software, such as SandRibbon for WPF, PDF Transformer or ActiveSync, which might be similar to Ngraph-gtk.