Details presented here are complete enough to build. Anyone may do so for personal use, but if you want to sell any that you build, I need to know about it because I need to eat (and pay for web hosting, etc), so if you want to profit from it, I do too. I'm not after much, this information is mainly here just to get the ideas out to people, but if they do make money, I want some of it to help maintain my independence and make more finished working ideas for people to use.
If you are interested in contacting me to negotiate a right to sell any part of this work, I can be reached via the domain registrar. Some of the ideas may be so simple and specific that I will place no restrictions on use at all, in which case this will be clearly stated on any relevant page, at the point where it applies.