Ask HN: How to start up as an individual developer?

I have been trying to become an individual developer for a period, and have developed several tools or little projects (mainly open source). Some of them actually are very helpful at least to me, but unfortunately I am the only one to use them.

No pull requests, no issues, even no stars except the only one from myself. I found it hard for them to be seen. I feel down because if there are no users, I can't get any feedbacks and it's hard for me to improve my projects. I feel trapped into a hole and can do nothing but to stay at the origin and get drowned.

How can I promote my open-source projects (and maybe products in the future) ? I'll really appreciate it if someone with related experiences can offer me some advice.