Implements 'cancelled' sharing-features of Google Reader for the excellent open-source RSS-Reader TinyTiny-RSS: share any page on the web via a bookmarklet and show your shared items in a widget on any website you want. Also allow to import shared&starred articles from Google Reader.
Why do you think that https://github.com/FreshRSS/FreshRSS is a good alternative to gritttt-rss