Evernote*
Boost Your Productivity
Evernote is an online tool designed to help you stay organized and on-task. Super user-friendly but powerful, it enables you to create and share notes and checklists with reminders, organize them into notebooks, scan in documents, attach files from your computer or import them from Google Drive, share notes via email or social media, capture handwriting and sketches, and even save webpage content to the note with a link back to the webpage.
Importantly, you can sync Evernote on multiple devices so it travels with you and updates all your devices in real time.
The base package (2 devices) is free. The packages with more features and unlimited devices are low-cost.