plans

[Frank S]

I cannot speak for the many sites you mentioned but the Admin has graciously provided participants of this site an avenue for them to publish their plans for a nominal price. I will say though that for the prices asked I have not found any published plans which were not nicely prepared and priced at an extremely reasonable rate for what the purchaser gets.
There are also many thousands or well documented homemade tools in the forums which all one need do is to read and learn how the tools were made. I sincerely hope this answers your question at least in part.