Simplenote is an Open Source utility that allows you to sync your essential notes on all your devices automatically.
You can use Simplenote to keep notes, lists, ideas, and more. All items entered will sync throughout all of your connected devices. It is set up in such a way that it lends itself to maximum efficiency. The UI is uncluttered, allowing you to jot your ideas quickly. All you need to do is create an account, open it up, and start writing.
Simplenote organizes your notes through a tag/pin option and provides a quick search option so you can find a past note as quickly as possible. You additionally have the opportunity to share your notes with others via a web link, or you can enlist other Simplenote users to assist you in the editing process. Simplenote also includes an auto-backup option that allows you to look back at an earlier draft by merely clicking the History button and utilizing the convenient slider.