Free Ideas!

Here are some ideas for products or solutions that could be out there. Exploit them if you wish -- I will never get around to it for these ones:

PS You can't patent these ideas, because this page is public and so prior art exists. And this site appears to be regularly archived at so that can be reasonably proved. Publishing prior art like this was the idea behind the defunct, which now links to an interesting commercial service

These were ones I listed which it turns out have already been "done" at least in some respects:

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