Downloading KP StarOne 6.6.20 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The default filenames for the program's installer are KPAAstro66.exe or KPStarone.exe etc.
The most popular version among KP StarOne users is 6.6. This free software is a product of StarOne Softcraft. KP StarOne is categorized as Home & Hobby Tools. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software.
From the developer:
KP StarOne is an advance astrology program for followers of KP System. It is probably the only astrology program based on WYSIWYG technology ( What You See Is What You Get on printer). It has many advance features like Advance Event Finder, Chart/ Birth time adjustment, House rotation, built-in KP Ephemeris, Muhurt Selector and Transit besides KP significators, 4-Step Significators, Aspects & Ruling Planets.
You may want to check out more software, such as KP New Astro, KP Typing Tutor or KPStarOne, which might be related to KP StarOne.