Wunderlist. I was using Things before, but the rip-off pricing and lack of web and non iOS clients made me switch. I like Wunderlist for its simplicity and th

Wunderlist. I was using Things before, but the rip-off pricing and lack of web and non iOS clients made me switch. I like Wunderlist for its simplicity and the "GTDishness". Supports multiple projects (or lists), sub-tasks, reminders, repeated tasks. No support for tags, and the recent Wunderlist2 release dropped support for the great "smart dates" functionality, which was an absolute killer feature on their old version.