I use m.kuku.lu, but if you plan to have more permanent account on there, like me, there’s one problem it has. It NEVER invalidates old cookie tokens, even after a password change. This means if you get compromised or forget to logout on someone else’s computer, there’s nothing you can do about it.
Edit: Forget it, they recently added “Log out on all devices” button.
Edit 2: At the bottom of aquapal.net it also says they use solar power, if you care about that.