Google Tasks alternative?

I am looking for alternative Task management systems other than Google where the tasks can be synced with EM Client 5 (and ideally also with Android phones).

Any suggestions appreciated, thank you!

Here we go:…
Sync to your owncloud, Davical, etc.

Works as good as CalDAV-Sync…

and CardDAV-Sync…


from eM Client account creation - yahoo, fruux, anything on caldav and maybe iCal if you have android client that supports it.