Deepnote - A collaboration platform for data scientists
SocialWall.me - Collect, analyse & broadcast your social media posts
Gyana - Intuitive easy-to-use report and dashboard tool to stop wasting time on repetitive and tedious tasks.
SocialRank Market Intelligence for Twitter - Enter any handle. Sort & filter their followers. Try @pmarca
DataQuest Beta - Codecademy for Data Science
Hosting Checker - Find out the hosting provider of any website