Pocket - When you find something you want to view later, put it in Pocket.
historious - historious is a single-click bookmarking search engine. Bookmark a site you like, then come back to historious and search for it using some keywords. It's that simple!
Instapaper - Instapaper is a simple tool to save web pages for reading later.
Note Board - Productivity app. Save information like a sticky notes.
wallabag - Save the web, freely.
Basket - A note taking application for KDE. Lots of features.