Listing it! FREE1.12 - Google Play

Listing it! takes all your lists to a whole new level. Or several actually. It allows each item in a list to become a list of its own, allowing you to nest lists and put them all in one easy-to-navigate hierarchy. It comes with a powerful options to import, export and share your lists. Once you start using it, you may just find it’s what you’ve been missing to get organized.

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This is the free version of Listing it!
It has every feature the paid version has. The only difference is the free version has ads. (That's also the reason this app needs internet accesss)
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Making lists within lists is a natural thing to do. Now, with Listing it!, you can do it naturally.
Whether you're making a to do list, a grocery list, a project task list, or a packing list, or any other sort of checklist, you'll love the hierarchical possibilities that listing it provides and the ease with which you can make your 'tree lists'. You can nest lists into as many levels as you wish.

Features:
- Easy sublisting
- Marking items as done
- Priorities
- Import from pasted text (including sublists)
- Import from text file (just open the file from your file browser app and chose Listing it!)
- Export to text file (sub lists are properly spaced)
- Share a list item or an entire list (via email, social media, etc.)
- Check and uncheck all items (including or excluding subitems)
- Delete checked items
- Move items and lists to other items and lists
- Move all checked items
- Shake device to reorder list (after changing priority or marking an item as done)
- Swipe item to edit