Question: Is there a service that enables me to extend application functionality with custom code without breaking the bank?

Power Apps is a low-code development foundation from Microsoft that lets you build AI-powered apps fast. It's got AI suggestions, drag-and-drop interfaces and integration with services like Azure, Visual Studio and GitHub. Power Apps also lets you deploy apps with confidence using its built-in deployment pipelines and manage apps at large scale securely. It's got a free Developer Plan and a Premium plan at $20.00 per user/month, so it's got a good range.

Pipedream is another good option for developers who want low-level code control but also no-code interfaces. It lets you run your own code with Node.js, Python, Go or Bash and integrates with more than 2,100 APIs. The service deploys immediately without any server setup and has features like AI-based development so you can quickly create complex apps. Pipedream offers a variety of pricing tiers, including a free plan, so you can pick what's right for you.

If you prefer a code-first approach, CustomJS lets you write and run your own JavaScript code for whatever you want to do, like sending emails, generating PDFs or updating CRM fields. It offers flexible invocation methods and several response types. CustomJS offers a freemium plan with 600 executions per month, so it's a good option for automating tasks.

Last, Replit is a cloud-based environment for building and deploying software as fast as possible in any programming language. It's got collaboration tools, AI code generation and several deployment options. Replit's pricing starts with a free tier and expands to more advanced plans, so it's good for individuals and teams.