Sometimes, when it comes to technology, it feels like there's no advancement unless something mind-blowingly new and complex is involved. Uniqueness holds a high value in this field, but sometimes the oldest, simplest ideas can be the most effective. Take PlicPad, for example. It's just a notebook.
An online notebook that can be accessed from anywhere you have an Internet connection, that is. It's made to be used less as an entire document system like Google Docs (or Drive, as it's now known) and more like a notepad to store reminders and links.
You don't need registration. Instead, you get a #title to access your notepad. Just remember that, and you're golden.
Simple as pie. Useful too.