I would love to open source pretty much any of my tools if there is demand for it.
If you would like me to open source one of my tools, please create an issue on this repo with a link to the tool! It can be as simple as this
title: Please open source XYZ
description: This is a link to the project: https://example.com
Once I can, I'll reply to the issue with a link to the newly created repository.
I'm an advocate for Open Source and Libre Software, but after a decade of development I've come to see that putting things on Github is not the same as open sourcing a project. Open source requires vision, commitment, marketing, leadership, and community, which are all qualities that are difficult to manifest and maintain.
The maintainers of Obsidian.md, who I admire, have taken a very mature position on the subject in their decision to not open source the core functionality in their product. While they value open source, and intend to eventually make the source available, "Open source requires a lot of extra effort, and the developers would rather put that effort into the app itself.1"
I've come to agree with that on a variety of levels. The user is the most important part of any product. Since I'm the only user for a lot of my tools (and certainly the only maintainer), it makes a lot more sense to spend my limited time on the features that I personally care about the most. In order to move fast on several projects at once, I keep the source for most of my projects in a single private repo. If there is any demand at all for open sourcing a project, I can migrate the source code for it to a newly created, public repo.