Entity Developer - Entity Developer is a powerful ORM designer for ADO.
MyGeneration - MyGeneration is an extremely flexible template based code generator written in Microsoft.NET.
T4 Awesome - The easiest way to use T4 Templates inside Visual Studio.
Codesmith - CodeSmith is a template-based code generator tool. It features a syntax nearly identical to ASP.
Devart T4 Editor - Devart T4 Editor is a powerful Visual Studio add-in for editing T4 templates with intellisense, syntax highlighting, code formatting and outlining, etc.
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.