I'm amazed how often this question pops up. And I like that there are so many managers out there.
I will throw my own hat into the ring:
It is a side project, but I use it as my daily driver. I keep saying it is a bookmark manager, but perhaps is is more of a directory builder.
I launched here a few years ago, and then life got in the way.
Anyway, its back and I've been running monthly sprints to improve it for myself.
Have a look and shoot me some feedback.