The site is quick to load, has a pleasant use of colour and is a good starting point.
My most important criticism is that it says they are java applets, but not what platforms they will run on? What platforms have they been tested on? In particular, if they CAN run on mobile/tablet platforms, the site should be mobile friendly rather than fixed-width. Indeed, given the low graphical content of the site, this would be an excellent opportunity to learn how to build a mobile-friendly site anyway.
However, before you put more work into the site, are you sure you have the basic structure right? E.g. Why have separate "software" and "download" sections? Isn't that a bit clunky? Surely it would make more sense if people could select download from the "software" page(s)?
Also, I note that the software images were not optimised. Given the small size of the graphics that is not a major issue, but, for example the bhd-small.png (15.5K) can be optimised to:
- bhd-small80.jpg (7.7K at 80% quality).
- bhd-small16.gif (3.2K at color depth of 16).
Lastly, I'd suggest brightening up the home page by including one or two pictures of your apps.
However, the criticisms I've made do not detract from the good work you have put in. Well done.