Total Subscription provides functionality which would allow the user to subscribe to node pages, taxonomy terms, etc. The main feature which distinguishes it from other subscription modules is that it allows subscription for Anonymous along with Authenticated users.
It's a simple rating widget with emoticons, readers can provide quick feedback. It also helps readers to engage with blog by reading more recommended articles based on emotion and share blog again driven by emotion. Its an easy to use and **free** widget for blogger
MyEffecto helps in increasing engagement and drives traffic of your blogs via a simple feedback plugin.