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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.
Telosys - Telosys is a lightweight Open Source code generator. Telosys allows to generate any kind of language (Java, Python, GoLang, PHP, JavaScript, TypeScript, C#, etc). It works without UML model. All the code generation templates are customizable.
Embold.io - Peer Code Review
Lime Text - Lime Text is an open source text editor.