CodeRush - DevExpress CodeRush for Roslyn uses significantly less memory, works faster, and lets you start Visual Studio faster.
Pathfix - The easiest way to add integrations to your SaaS
ReSharper C++ - ReSharper provides on-the-fly code analysis and eliminates errors in C#, VB.NET, XAML, ASP.NET, and XML
hotglue - An embeddable data integration tool for B2B developers built on the Python ecosystem.
Coverity Scan - Find and fix defects in your Java, C/C++ or C# open source project for free
Extend by Auth0 - Let your customers write the rules