May I suggest that you take a look at the excellent open source Claws Mail (or the earlier Sylpheed) and think about providing it for SoftMaker customers? If you add a simple csv import to Claws Mail and rebuild it as a SoftMaker tool you will have a wonderful, light, fast, robust email client which you could probably customise and recompile in an afternoon. This would make a HUGE difference to SoftMaker Office. Please, please, please do consider. We all need a proper 'SoftMaker' email client and the code is just sitting there waiting for you.
Other than that, everything seems fine. TextMaker remains, in my opinion as an author, the best word processor for writing books and large documents. It allows me to create chapter templates which are exactly what is needed, it is reasonably light, very fast, and I have always liked the inbuilt flatfile database. Perfect. PlanMaker does exactly what it should do and Presentations is all you need (although you could make it a more intuitive drawing programme). So, all we need is that elusive email client. Nothing fancy, just a POP / IMAP client with basic facilities. Claws Mail is a good first step - it works brilliantly, is fast and light. There are some good open source plugins for it which you could also consider. I would be happy to help you draw up a design spec, and also act as a beta tester for such an application.
