Joplin is an awesome FOSS note app and alternative to Obsidian. Love it, I use WebDAV to link between devices. Lots of plugins for extra functionality as well.

Just adopted Joplin (FOSS all the way) for notes on desktop and mobile, using my own Seafile instance as the cloud service through webdav. Very happy with it so far, be it short and quick or long and complex notes.

Also using Zotero for bibliography management and related notes, also backing up to Seafile webdav. Joplin and Zotero also play together, but haven’t tried that out yet.