Refraction is a mature code generation tool that works with 56 languages, including ABAP, Java, Python, JavaScript and others. It can generate code, refactor code to bring it up to modern standards and spot bugs. It can also convert code from one language to another and from one CSS styling framework to another, so it's good for developers who work with multiple languages and frameworks. It also offers a free tier, so you can easily try it out and build it into your workflow.
Another contender is CodeGeeX, an AI-powered coding assistant that can help developers write code faster. It can suggest code, translate code and add comments. With a large-scale multilingual code generation model trained on more than 20 programming languages, it's good for developers who have projects that span multiple languages. The service is designed to speed up development by using AI to handle some of the drudgery of coding.
Figstack is a collection of AI-powered tools that can help you understand code, translate it and maintain it across different programming languages. Its main tools are Explain Code, which converts code into natural language, Language Translator, which converts code from one language to another, Docstring Writer, which generates documentation, and Time Complexity, which optimizes code performance. The service is geared for developers who often switch between languages and who need to automate some documentation tasks. You can try it with a free trial before signing up for a plan.