This is new post after a long gap.
Well this may not be so shiny post. However, I am posting this as I find it really useful in day to day use.
Reason is simple. Using default windows explorer, we can only see file size in details views. However what if you want to see folder size collectively. This will be specially useful while cleaning up your hard-drive (System drive?) .
Few of its features are its small footprint, tabbed interface and folder size in its default view.
Their official site is http://www.explorerxp.com/
Their could be many such alternatives available. You guessed it right, this on is my favorite and hence is the post.