Quip - Quip is the modern productivity suite that simplifies your life and helps your team get work done faster.
Sourcery AI - Sourcery reviews your code everywhere you work and automatically suggests improvements
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
Google Open Source - All of Googles open source projects under a single umbrella
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Video Search for YouTube - Search any YouTube video like a document.