[itnAAnti]

If you have aspirations of ever making a living from running an online business, what you would learn from trying to monetize these two would be worth more than the money. If you don't care about making money online and its just a hobby, then I think Jayd's suggestion of putting them on flippa is a good idea. You could cut ties, make some money, eliminate the monthly cost, and ensure they continue to be useful to people (to the extent that you can without doing it yourself, anyway).

With <1,000 users / month, I think advertising is unlikely to cover your hosting costs, and ads would impact the speed of Ninongo.

Trying to comercialize either would be a lot of work. Probably more than writing the original code bases, so only do that if you're really interested in learning how to make a business out of it - don't do it on a whim or you will almost certainly fail.

If none of the above sounds appealing to you, then add a "tip jar" and mention that maintaining the tool costs you money, if the visitor finds it useful to leave a small donation.