I just recently came across Jules, an autonomous coding agent by Google, and was impressed with its free access level. I dumped a whole directory full of haphazard Python scripts I've been accumulating over the years into it and asked it to refactor them into less of a mess and it did a remarkable job turning the folder into somewhat of an actual application. You can hook it up to your Github account too, if you want, and it'll submit its changes as a new branch.

Just bear in mind that it'll make mistakes, I did have to do a thorough debugging run to make sure everything still worked the same. But the amount of grunt work it saved me was huge.