Although blog posts can display the date on which they were created, it is sometimes useless to display this information. At least, this can be a way to make index pages lighter. In this case though, it can be useful to display the date of the last blog update on the index. It allows the visitor to see the last update time at a glance.
This plugins provides a widget to display the date of the last blog update.
The widget has 4 options: