Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Snyk - Snyk helps you use open source and stay secure. Continuously find and fix vulnerabilities for npm, Maven, NuGet, RubyGems, PyPI and much more.
TL;DR Email - Send short emails & read emails as fast as you read Facebook
Dependabot - Automated dependency updates for your Ruby, Python, JavaScript, PHP, .NET, Go, Elixir, Rust, Java and Elm.
mlist - Email newsletters, outside of the inbox
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.