Productivity web apps that I have used:

- Carbon Fin Outliner (Outliner) - https://cfoutliner.appspot.com/

- Writebox (Dropbox Text Editor) - https://write-box.appspot.com/

- Toodledo (Tasks, Notes, etc) - http://www.toodledo.com/

- Textdrop App (Dropbox Text Editor)- https://www.textdropapp.com