4 out of 5 stars (based on 1 review)
QOwnNotes is a free open source (GPL) plain-text notepad. The program has support for markdown, and includes a to-do list manager that works on FreeBSD, Linux, MacOS and Windows. It can optionally work together with the notes application of ownCloud or Nextcloud.
except cloudflare which is being used on the website, this app seems to be quite trade-free.