NoteSync with Google Docs is described as 'NoteSync lets you take notes fast and sync them with your Google docs account. Automatic syncing happens every minute or when you feel like it by pressing the sync button. Offline mode fully supported'. There are more than 100 alternatives to NoteSync with Google Docs for a variety of platforms, including Windows, Android, Online / Web-based, iPhone and Mac. The best alternative is Joplin, which is both free and Open Source. Other great apps like NoteSync with Google Docs are Standard Notes (Freemium, Open Source), Google Keep (Free), Microsoft OneNote (Freemium) and Evernote (Freemium).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.