Sourceful - A search engine for publicly-sourced Google docs
BuiltWith Toolbar - Reveals the tech underneath a website. Browser extension.
Gamayun - An AI tool that researches and summarizes any topic for you
Spokk - Get your creations or ideas for blogs, designs, art, music, photos, YouTube videos or anything...
CareKit by Apple - Open source software framework for creating health apps
Resource Center by UserGuiding - All your product, marketing and help materials in one place