WebSatchel - Copy and save web pages to your own personal archive
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Pocket - When you find something you want to view later, put it in Pocket.
Basket - A note taking application for KDE. Lots of features.
Keep Everything - Light & Fast Web Archiver for iOS, OS X.
Padlet - Visual boards for organizing anything.