Daily Agenda was a concept I created after being disappointed by existing to-do list apps.
The idea is that Daily Agenda would automate parts of your to-do list. For example, by prioritizing tasks based on their dependencies. It would also be able to see your typical "velocity" to help schedule a more realistic workload.
The landing page was up for almost a year while I collected signups. I also created a prototype of the app, but I never got around to finishing it.