Quiet Read is completely free, but there is a set of features that is only available after purchasing a license. These features are:
Send links to Instapaper.
Send links to Read It Later.
Link list search and filter.
Multiple link selection.
Extended sorting options.
Export to CSV.
Optional dock icon and proper Mac OS X window.
Sometimes, when I am browsing the web, I want to store a link for later. There are note taking applications and everything-buckets to do that, but I wanted something light and simple. Simple as dragging a link onto a menu bar item to store it.