semgrep : semgrep is a tool for easily detecting and preventing bugs and anti-patterns in your codebase. It combines the convenience of grep with the correctnes...
howdoi : Instant coding answers via the command line.
Squoosh : Squoosh is an image compression web app that allows you to dive into the advanced options provided by various image compressors.
TinEye is a reverse image search engine. It finds out where an image came from, how it is being used, if modified versions of the image exist, or if there is a higher resolution version.