I am hosting a couple of open source project which you can use for free. I use these myself and it doesn't really cost me much more to let other people use them too.
These Services are provided without cost and as is without any warranty. In short: You can use them if you don't abuse them. I might shut down a service or limit the way you can use them but collect as little information as possible. I'll do my best to inform you of any significant changes to one of these services if I have the information to contact you.
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Please read the Terms of Service and data protection sections for more information.