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.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Instapaper - Instapaper is a simple tool to save web pages for reading later.
Lookmark - Track updates from the apps you've bookmarked on iTunes
WebSatchel - Copy and save web pages to your own personal archive