Uxcel - The easiest way to learn UX/UI design
AppFollow - AppFollow is an integrated solution that makes monitoring, analyzing, and elevating your app's reputation easy.
UX Challenges - Done reading about UX? Start doing it.
appfigures - Cross-platform app store analytics for all of your mobile apps.
UI Coach - Become a better UI designer in 30 days
AppReviewBot - Get new iOS App Store and Google Play Store reviews directly in Slack, Microsoft Teams or Mattermost as soon as they happen. Unlimited apps, every country.