RuboCop - A Ruby static code analyzer, based on the community Ruby style guide.

What If Bitcoin? - Check how much you could have made by investing in bitcoin.

SonarQube - SonarQube, a core component of the Sonar solution, is an open source, self-managed tool that systematically helps developers and organizations deliver Clean Code.

Cryptominded - Where you learn more about cryptocurrencies

ESLint - The fully pluggable JavaScript code quality tool

Robinhood - Free stock trading service.