Lists To Do ...

I've had enough problems with Wunderlist to need to jump ship. The Android app is very large (OK, my phone's space is limited) and it loads slowly if at all. I started with a list of free Wunderlist alternatives (what I want may not be free, but I'll start here). I selected for Android AND (Online OR (Mac AND Linux)) clients AND NOT Freemium. (In some cases, like Google Tasks, I know there are many clients for Android, so I let it slide even though technically it's Online only. I want an Android client so I have offline access to my tasks when my phone doesn't have an uplink, and yes I know synchronization is hard.) So the list started as:

• Google Tasks: Free by Google - Online
• Simplenote: Free by Automattic - iPhone, iPad, Online
• Producteev: Free* - Mac, iPhone, Windows, Android, Online, Blackberry
• Todo.txt: Open Source by Gina Trapani - Mac, iPhone, iPad, Windows, Android, Linux
• Any.DO: Free by Any.DO - iPhone, Android
• Org-mode: Open Source by Carsten Dominik - Mac, iPhone, iPad, Windows, Android, Linux
• Cloud Checklist: Free by Skybuffer - Online
• allthings: Free* by welovelists - Online
• Coolendar: Free by Fabiano Franz - iPhone, Android, Online
• Yodiz: Free by Yodiz - Mac, iPhone, iPad, Windows, Android + Tablet, Linux, Online
• Smthngs: Free by Valentin Shergin - Online, Android
• TickTick: Free by Appest Limited - Mac, iPhone, Windows, Android, Linux, Chrome OS
• One Line Todo: Free by eveningsun - Android
• do.com: Free - iPhone, Android, Online
• ToDo Pro: Free by Appigo, Inc. - iPhone, iPad, Android, Online

I want:

• multiple lists (or filtered views aka smart folders),
• tags (bonus if the application can know which are GTD contexts; not a feature in Wunderlist either),
• easy way to re-order tasks,
• optional due dates (or I'll keep the ones with due dates in Google Tasks, assuming Google doesn't kill it off like Reader)

So far:

• Google Tasks: Adding dates far in the future is painful from the web interface, so I need a good client.
• Simplenote: I already use JadeNote on my phone, but it's not to-do-specific. (last)
• Producteev: Wait, I can't re-order tasks? Bah.
• Todo.txt isn't going to be very different from Simplenote that I already use.
• Any.DO: The interface wasn't compelling enough to make up for its Android footprint.
• Org-mode: I'm worried about offline access now that I look at it again.
• Cloud Checklist: No tags or filters, but the rest is there. The web interface doesn't seem to have a mobile view, although it's fairly responsive on my Android phone, but that does mean no offline access.
• allthings: Worried about offline access when my phone doesn't have a data link.
• Coolendar: I'll check it out. (middle)
• Yodiz: It sounds like much more than I need for myself.
• Smthngs: Whoa. Wait. This one merits serious consideration. (#1) UPDATE: It's available online and on Android, it works in offline mode, it has all the ways I like to slice and dice, except for ONE BIG ONE. I always need import and export before I put my data in a bucket, and I don't see that. I'm sad, because it's lovely and responsive, but I'd like to save myself a headache in the long run. *sigh* Strike another one from the list.
• TickTick: The Android app is a bit large, and I'd rather see screenshots or a test mode.
• One Line Todo: This one has Google Tasks support for the Online access I want (I hope). However, the bar is set at the Google Tasks interface, and I'd rather do better than that.
• do.com: I don't really need deals, thanks.
• ToDo Pro: Just for me, thanks.
• Taskos (Task List): Thanks to Rob, I'm adding this to the list as a Google Tasks Android client. (#2)