YouTube Kids - YouTube for the youngins on iOS and Android
Tinitell - Wearable mobile phone for kids. GPS enabled.
TisaneAPI - Detect hate speech, cyberbullying, and more in 27 languages
Toymail Talkies - Toys that connect people
Interland by Google - A game to help kids be safe, confident explorers online
Kids in Touch - A safe, fun, messaging app for kids monitored by parents