Portable Secret is an encryption tool that uses the browser's inbuilt Web Cryptography APIs, allowing payloads to be encrypted and stored on any device without the need for dedicated encryption software.
Andreessen Horowtiz (a16z) published a handy calculator tool that explains a range of SaaS growth metrics depending on the type, size, and sales type of a SaaS company.
Hourups is a collection of 165 free tech skills tutorials on YouTube that are grouped by skill and domain types, such as Python, Javascript, front-end dev, digital marketing, data analysis, communication, & devops.
Lyra is a javascript full-text search engine that can be deployed on edge-networks and scale automatically. Check out this interview with Lyra's creator Michele Riva of Nearform.
Google, through the web developers website, published a handy digital accessibility guide covering topics like motion, colour contrast, & page structure.
Tella is a very handy video recording tool that allows you to record your screen and your camera feed at the same time, ideally to make great demo videos.
CSS Tricks posted a useful post described a few different ways to display an email address online while trying to stop spam bots from harvesting the address.