I owned the software company invers Software which made Calamus and iCalamus until the end of March 2018. Since then, iCalamus is property of Lemke Software GmbH, known for their GraphicConverter application.
Therefore, I had a conflict of interest with regard to those topics by definition of Conflict of Interest. I wasn't interested in hiding this COI by using any fake name on the WP because I use my real name almost everywhere on the web.
I always try to write Wikipedia content in the most objective way possible. So if other contributors find anything in my contributions which may be seen as subjective, advertisement or commercial, please let me know.
Since 2014, I run a multi-language MediaWiki instance about intactivism, called IntactiWiki.