I'm building Vikunja, the to-do app to organize your life.
It started out more as a project for myself - I was a heavy wunderlist user and wanted something with a few more features like list sharing with link and without sign-ups and grouping multiple lists together.
Also self-hosting, open-source and not depending on other people's buisiness model are quite important to me.
Since then, Vikunja has grown and is useful for some.
If Vikunja is useful for you too, you can buy me a coffee here to show some support.