TisaneAPI - Detect hate speech, cyberbullying, and more in 27 languages
Tweedle App - Notion is nice but sometimes all you need is an app like Tweedle.
YouTube Kids - YouTube for the youngins on iOS and Android
Plume - App for writing documents, scripts, books and more.
Interland by Google - A game to help kids be safe, confident explorers online
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.