This program allows you to take notes that you'll be able to save as a reminder. You can tag them to make finding them even easier. Simplenote is available on a number of platforms and can be synchronized seamlessly between them through your user account. There's a browser version, an app for iOS and Android and its also available on Mac and Linux among many others.
Extra features are not what Simple Notepad is about, so you won't find too many of them, but that doesn't mean this app isn't extremely useful. It is. You can use it to control different versions of a text file, or work on it with your whole team in real time, or even publish it online automatically by using an exclusive URL on Simplenote's own servers.