I presumed most developers did, until a few years ago I asked some colleagues and not one of them said yes. Here's a handful of mine ...

- Static site generator

- Web server that delivers live-transformed Markdown

- EPUB and/or DOCX generator

- Book library management tool

- Markov-based text generator

- Hex map renderer

- Automatic Go API generator from structs

- Automatic C# API generator from Postgres database

- ORMs for Postgres in C# and Go

- C# migration tool for Postgres and MySQL

- Seneca-style microservices toolkit for C#

- Functions platform for Go

And many more ...