regenerator - Source transformer enabling ECMAScript 6 generator functions in JavaScript-of-today.

•    Javascript

Source transformer enabling ECMAScript 6 generator functions (yield) in JavaScript-of-today (ES5)

gulp-babel - Gulp plugin for Babel

•    Javascript

Issues with the output should be reported on the Babel issue tracker.See the Babel options, except for sourceMap and filename which is handled for you.

recast - JavaScript syntax tree transformer, nondestructive pretty-printer, and automatic source map generator

•    Javascript

In less poetic terms, Recast exposes two essential interfaces, one for parsing JavaScript code (require("recast").parse) and the other for reprinting modified syntax trees (require("recast").print). See ast-types (especially the def/core.js) module for a thorough overview of the ast api.

Sourcery - Meta-programming for Swift, stop writing boilerplate code.

•    Swift

Sourcery is a code generator for Swift language, built on top of Apple's own SourceKit. It extends the language abstractions to allow you to generate boilerplate code automatically. It's used in over 8,000 projects on both iOS and macOS and it powers some of the most popular and critically-acclaimed apps you have used. Its massive community adoption was one of the factors that pushed Apple to implement derived Equality and automatic Codable conformance. Sourcery is maintained by a growing community of contributors.

gqlgen - go generate based graphql server library

•    Go

This is a library for quickly creating strictly typed graphql servers in golang. See the docs for a getting started guide.

NSwag - The Swagger/OpenAPI toolchain for .NET, Web API and TypeScript.

•    CSharp

NSwag is a Swagger/OpenAPI 2.0 and 3.0 toolchain for .NET, .NET Core, Web API, ASP.NET Core, TypeScript (jQuery, AngularJS, Angular 2+, Aurelia, KnockoutJS, and more) and other platforms, written in C#. The Swagger specification uses JSON and JSON Schema to describe a RESTful web API. The NSwag project provides tools to generate Swagger specifications from existing ASP.NET Web API controllers and client code from these Swagger specifications. The project combines the functionality of Swashbuckle (Swagger generation) and AutoRest (client generation) in one toolchain. This way a lot of incompatibilites can be avoided and features which are not well described by the Swagger specification or JSON Schema are better supported (e.g. inheritance, enum and reference handling). The NSwag project heavily uses NJsonSchema for .NET for JSON Schema handling and C#/TypeScript class/interface generation.

rust-bindgen - Automatically generates Rust FFI bindings to C (and some C++) libraries.

•    C++

impl period has been started! Join us at Gitter.im. bindgen automatically generates Rust FFI bindings to C (and some C++) libraries.

cranelift - Cranelift code generator (formerly, Cretonne)

•    Rust

Cranelift is a low-level retargetable code generator. It translates a target-independent intermediate representation into executable machine code. For more information, see the documentation.

rust-bindgen - Automatically generates Rust FFI bindings to C (and some C++) libraries.

•    C++

bindgen automatically generates Rust FFI bindings to C (and some C++) libraries.

graphql-code-generator - A tool for generating code based on a GraphQL schema and GraphQL operations (query/mutation/subscription), with flexible support for custom plugins

•    TypeScript

GraphQL Code Generator is a tool that generates code out of your GraphQL schema. Whether you are developing a frontend or backend, you can utilize GraphQL Code Generator to generate output from your GraphQL Schema and GraphQL Documents (query/mutation/subscription/fragment). By analyzing the schema and documents and parsing it, GraphQL Code Generator can output code at a wide variety of formats, based on pre-defined templates or based on custom user-defined ones. Regardless of the language that you're using, GraphQL Code Generator got you covered.

graphqlgen - ⚙️ Generate type-safe resolvers based upon your GraphQL Schema

•    TypeScript

graphqlgen has been officially deprecated in favor of the The Guild's project GraphQL Code Generator. Learn more about the collaboration of Prisma and the Guild in this blog post. Programming in type-safe environments can contribute toward great confidence in your code's integrity. graphqlgen aims to leverage the GraphQL type system to make your resolvers completely type-safe. This is important because resolvers are the heart of any graphql service and yet the hardest to statically type due to their dynaminism.

NSwag - The Swagger/OpenAPI toolchain for .NET, ASP.NET Core and TypeScript

•    CSharp

NSwag is a Swagger/OpenAPI 2.0 and 3.0 toolchain for .NET, .NET Core, Web API, ASP.NET Core, TypeScript (jQuery, AngularJS, Angular 2+, Aurelia, KnockoutJS and more) and other platforms, written in C#. The OpenAPI/Swagger specification uses JSON and JSON Schema to describe a RESTful web API. The NSwag project provides tools to generate OpenAPI specifications from existing ASP.NET Web API controllers and client code from these OpenAPI specifications.

graphqlgen - ⚙️ Generate type-safe resolvers based upon your GraphQL Schema

•    TypeScript

Programming in type-safe environments can contribute toward great confidence in your code's integrity. graphqlgen aims to leverage the GraphQL type system to make your resolvers completely type-safe. This is important because resolvers are the heart of any graphql service and yet the hardest to statically type due to their dynaminism. Edit ./my-app/src/schema.graphql to your heart's content.

grunt-babel - Grunt plugin for Babel

•    Javascript

Issues with the output should be reported on the Babel issue tracker.See the Babel options, except for filename which is handled for you.

hack-codegen - Library to programatically generate Hack code and write it to signed files

•    Hack

Hack Codegen is a library for easily generating Hack code and writing it into signed files that prevent undesired modifications. The idea behind writing code that writes code is to raise the level of abstraction and reduce coupling. You can use your own way of describing a problem and generate the corresponding code. E.g. see examples/dorm. In this example, we use a schema to describe the structure of the data, and we use Hack Codegen to write the matching code. The DORM example shows how to use the different aspects of the code generation in a simplified real-life example. The included tests also exemplify the usage of the different components.

Graphaello - A Tool for Writing Declarative, Type-Safe and Data-Driven Applications in SwiftUI using GraphQL

•    Swift

Use GraphQL directly from your SwiftUI Views. Graphaello is a Code Generation Command Line Tool that allows you to use property wrappers in your SwiftUI Views, to use data from GraphQL. If you're looking for something like this, but for other platforms, Graphaello is heavily inspired by Relay.

Perfect Storm

Perfect Storm started life as a code generation utility. It now includes Model Components, Rule Engine details and a class loader. It requires .NET 4.0 to be installed.

Yet Another Code Generator (YACGEN)

YACGEN is a code generator that creates output based on database schema

CustomTemplating - Template Text Transformations with custom T4 host

•    CSharp

CustomTemplating allows the usage of the Text Template Transformation Toolkit (T4) from custom applications, without VS IDE as Host. It simplifies the start of the text transformation process and allow to pass arguments from the application to the template transformation process.

LLBLGen ANGTE (ASP.Net GUI Templates Extended)

LLBLGen ANGTE (ASP.Net GUI Templates Extended) makes possible to use LLBLGen template system to generate a reasonable ASP.Net GUI that you can use as the base of your project or just as a prototyping tool. It generates APS.Net code with C# as code behind using .Net 2.0