https://developers.cloudflare.com/1.1.1.1/1.1.1.1-for-families/
Cloud flair has released two new sets of resolovers, one that filters malware and one that filters malware and adult content .
OpenDNS does this as well and offers some more customization but you need to setup a dyndns client to link your IP to an account to get any control.
Cloudflair has just opted to keep it simple and offer different sets of IPs with different functionality.