I'm looking for a stable app that combines a calendar and todo list. I've tried many different things already but none of them really fit my purpose. Wunderlist does not offer any Calendar functionality besides the due date feature, the same goes for Astrid, fetchnotes doesn't even offer that last time I checked. Google calendar is somewhat close, but it doesn't give you the possibility to just drop down a note. Also, I'd like to have notes sorted in lists that I can share with other users. That's probably the most important feature.
These are my criteria, until now Wunderlist has come closest. If anyone knows a good alternative which offers calendar functionality (a monthly and weekly overview plus an agenda for example), please let me know
Thanks a lot in advance