Basket - A note taking application for KDE. Lots of features.
Pocket - When you find something you want to view later, put it in Pocket.
ArchiveBox - The open-source, self-hosted internet archiving solution
wallabag - Save the web, freely.
Advanced Bookmark Search - A fast offline search engine for bookmarks that supports searching operators
Instapaper - Instapaper is a simple tool to save web pages for reading later.