Evernote is an outstanding application for capturing just about anything you want from wherever you want and finding it again! The Evernote search facility is awesome (here’s why), even when I don’t tag resources all that well, Evernote finds them again! I would recommend it for both teachers and students and have included it on the organisation page of the student version of this site.
Create a note using a phone or any web browser or use a desktop application.
Windows Desktop https://evernote.com/evernote/guide/windows/
The free version of Evernote is excellent and more than adequate for millions of users!